How To Test A Knock Sensor Chevy

In conclusion, you can drive with a bad knock sensor—that is, if you want to destroy your engine and get atrocious performance from your car. There are two knock sensors. Hard to beat prices on 275hp Certified Knock Sensor!Showcasing a huge collection of 275hp Certified Knock Sensor available for sale today. Code p0324 After I installed my tune in my sedan I went to data log and did a code scan and found the this code popped up. The knock sensor senses the vibrations of the engine and will decrease acceleration until the sensor is replaced. To find out if your knock sensor is broken, you'll need to test it, which should take 10 minutes. With a faulty sensor, there is a chance that higher emissions are being produced from the engine because the engine may run hot. and when it is cold outside 5-30 degrees it seems like it is misfiring, and sometimes does it so bad it kills, plus a lack of power, and seldom, and random misfiring/hesitation when warm, when i. I have a 1998 chevy silverado 4x4 with a 5. If there is a problem with this, you will need to replace the knock sensor. Also, if your vehicle has run over 100,000 miles without replacing the knock sensor, it is best to get it changed. The only way to fix a bad knock sensor is to replace it. very expensive job. Guaranteed Fitment Enter your VIN (Vehicle Identification Number) and we’ll check each part on your order to ensure proper fitment. If you need to know if this 3X 18X crank sensor test applies to your specific 3. The corrosive buildup causes the code. 8L GM vehicle, take a look at the 'Applies To:' box on the right and scroll with the left/right arrow. Unplug the wires from the sensor. If scanner indicates that knock sensor voltage is not within manufacturer's specifications, use the DVOM to test live data at the knock sensor connector. The check engine light and knock sensor-related OBD codes will immediately point a technician to the knock sensor. The sensors themselves are mounted at the bottom of the V and between the cylinder heads. Knock sensor wire routed into CTS harness. How to Test a GM Knock Sensor by Russell Wood The knock sensor on your GM engine is designed to sense detonation in the engine that causes a knocking noise from an improper air/fuel/spark ratio How to test a chevy knock sensor. I read everything on here and other places before starting the job. Turn ignition off. This is because its function is to sense vibrations caused by engine knock or detonation. GM for a long time in the mid 80's through early 90's made external knock sensor modules that took the raw signal from the knock sensor, filtered and conditioned it, then set the ECU what basically amounted to a digital signal for Knock/No Knock. 8 p0327 code for knock sensor? replaced both knock sensors and harness, confirmed hz of about 22,500 hz reading from both sensors when block is tapped with a ball peen hammer. Once the intake manifold is off, take out all the foam from below the manifold. The knock sensor module is located inside the pcm, under the cover with two screws. MAKE SURE YOU DON'T MISTAKE IT FOR THE BLUE WIRE WITH A RED STRIPE. I need this really dumbed down if someone could walk me through how to actually check to see my knock sensor is getting power. 2) It is a piezo electric or crystal component. This is true for the knock sensor as well. The computer in the vehicle’s control system can detect the different sounds in the car’s engine. Replacing the knock sensors can prevent detonation related engine damage and restore engine performance. 1994-1995 B-Body (Caprice, Impala, Roadmaster, Fleetwood) used 2. Also, your car's computer system should notify you when there is a problem with the knock sensor. TEST DESCRIPTION. This sensor was removed while performing a service bulletin repair and was not the affected sensor. If the computer doesn’t recognize a sound, it will illuminate the Check Engine Light. 9K ohm resistor in the knock sensor reduces the voltage to about 2. Today I'll be showing you how to test the primary or upstream O2 sensor in a 2004 Chevy Silverado with a 5. no we don't have that. The knock sensor detects vibrations that come from a knock or an irregularity in combustion and send a signal to the engine control computer, which then adjusts timing to correct the knock. The intake manifold will have to be removed to access the sensor. Most new GM vehicles use the knock sensor during the first few seconds of operating to test the knock control system. The knock sensor is to blame for detecting engine pinging. The knock sensor on your GM engine is designed to sense detonation in the engine that causes a knocking noise from an improper air/fuel/spark ratio. These steps can help you to install your new knock sensor efficiently: Difficulty level: Moderate. P0332 Chevrolet Meaning The Knock Sensor (KS) system monitors both knock sensors in order to determine if detonation is present. An easy way to test to see if the knock sensor is working is, with you or a buddy hold a timing light on the timing mark while the other lightly taps on the block buy the knock sensor with a hammer. Knock sensor could be bad, too. 8L GM vehicle, take a look at the 'Applies To:' box on the right and scroll with the left/right arrow. This is done by attaching a gauge, such as an oscilloscope, to the wire that runs from the knock sensor to the car's computer. After a test drive, the DTCs returned. So the knock sensor itself just screws into the engine right? i mean the whole piece itself is twisted in ,correct? If so, what size socket, or wrench, do i need to unscrew it?. This OBDII code can put your vehicle into limp mode and most certainly can cause issues in car performance. 3L V8 Exhaust & Emission Knock / Detonation Sensor. It is basically the. 1L V8 Engines (1999-2010). the code should now read Knock Sensor 1 Circuit Low Input Bank 1). Find which wire going into your ECU is for the knock sensor. Choose top quality brands AC Delco, Beck Arnley, Delphi, Forecast, Standard Motor Products, Walker. Code p0324 After I installed my tune in my sedan I went to data log and did a code scan and found the this code popped up. This will tell you that the sensor system is bad if the code is still there or you really have an engine knock. 8) To test the wide band knock sensor, with engine and key off, probe with a volt meter set to AC, between battery ground and the knock sensor signal wire. Please help! 14 Answers. Last monday it came on n hasn't gone out. Knock Sensor. It works by observing and identifying the standard range of engine noise from its operations. 0L Engines (2003-2008) How To Test The GM Mass Air Flow (MAF) Sensor: 4. Here at Chevrolet, we're committed to making sure your experience with one of our new vehicles is an excellent one. so all i know is what I've been through with my truck just purchased a 92 88 that I mixed motors in the knock sensor got damaged just like yours and it starts like crap after a few min runs great then if you drive it a while it's like the fuel pump shuts down also I have no oil pressure registering on the gage I know most of it is from that. Knock sensor detects detonation and lets the computer know to retard timing to protect the engine. Hi, I have a 94 Chevy Blazer 5. Problems with the knock sensor will not cause an engine performance problems. No matter what angle you try, you cannot see the thing. This is because its function is to sense vibrations caused by engine knock or detonation. He also did a tune-up and checked the crankshaft position sensor (it was okay). After a test drive, the DTCs returned. How to fix a bad knock sensor. Above 60mph during excelleration on to highway, there is a sound of a little howling, growling like a diesel engine with a little vibration. 3 flex fuel engine Z71, and I am having an issue with the bank 2 knock sensor. Install the new rear bank knock sensor. com FREE DELIVERY possible on eligible purchases. 11-08-09 09:45 PM - Post# 1802109 ok so the check engine light come on and it says knock sensor 2. Thank's for landing here. This engine had a slight rod knock or upper engine noise that was causing the knock sensor to record a false signal. P0325 is a trouble code indicating that the signal from the knock sensor is not performing in its normal range. In an OBD-II system, a failed knock sensor should set a DTC of P0324 to P0329. Knock sensor detects detonation and lets the computer know to retard timing to protect the engine. It also tells the PCM the severity of the knocks. GM for a long time in the mid 80's through early 90's made external knock sensor modules that took the raw signal from the knock sensor, filtered and conditioned it, then set the ECU what basically amounted to a digital signal for Knock/No Knock. This is done in order for the ECM to test the knock sensor. So the knock sensor itself just screws into the engine right? i mean the whole piece itself is twisted in ,correct? If so, what size socket, or wrench, do i need to unscrew it?. lol Knock sensor, 1. Codes are po327 and po332. How To Repair Code P0332 on a 2004, 2005, and 2006 GMC (How To Replace Knock Sensors and Harness) You know the story, your check engine light comes on and when you scan it, you see code P0332 which is related to the knock sensor circuit. Of course, this means that the GMC Sierra and Yukon of the same years have the same issues. This is a discussion on Knock sensor bypass within the General Help forums, part of the LSx Technical Help Section category; Does anyone know a good procedure to temporarily bypass both knock sensors on a 2000 LS1?. Also, knock sensor cost is a price cheaper to pay than having your engine replaced. This page will list all the Check Engine Light questions and answers asked of us pertaining to Chevy vehicles. A faulty knock sensor will cause a faulty code to set, and may also cause ignition timing to be skewed. They can also take a little digging to get to, which makes replacing it the way to go. If the knock sensor wiring harness and electrical connectors are working properly, the technician will test the knock sensor. An easy way to test to see if the knock sensor is working is, with you or a buddy hold a timing light on the timing mark while the other lightly taps on the block buy the knock sensor with a hammer. I recently had my check engine light come on and upon checking it with a pocket scanner came up with a DTC P0155 (O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1). The code scanner showed a code P0327, which is a knock sensor issue. P65Warnings. Buy Knock Sensor with Harness Pair Kit Set for Chevy GMC Silverado Sierra Cadillac: Detonation - Amazon How to test chevy knock sensor. When knock occurs, the knock sensor produes a small AC voltage that rides on top of the 2. The repair is to remove the upper plenum, replace the rear sensor and wiring harness, and build up a "dam" of silicone in front of the port to deflect the water to the sides. I started the car and gathered an initial ALDL scan to check sensors,etc. The sensor takes that information and sends it to the computer, which in turn retards the timing on the engine to fix the problem. I am out of options as far as I know at this point. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. But now I have codes for the knock sensors. Knock sensor detects detonation and lets the computer know to retard timing to protect the engine. Such Chevy knock sensor problems are usually caused by intrusion of water into the sensor cavity thereby leading to corrosion of the rear bank knock sensor. It runs the same when the knock sensor is unplugged, which makes me think the knock sensor isn't the culprit. See here for a step-by-step guide on how to diagnose and fix check engine light code P0325. Check the voltmeter for continuity after turning the vehicle on. How can you check the knock sensor on 2007 Chevy Cobalt? If a knock sensor was bad, the check engine light would be illuminated and the code(s) set would indicate so. A lack of knock signal at this point will set a KOER code for the knock sensor. 1997 Chevrolet K1500 4x4 Silverado V8 5. Jumping onto the Summitracing. 1993 to 1995 sensors different then 1996-97. The easer solution is finding a resonant knock sensor to a car with a similar cylinder bore. It is not compatible with the. Re: 454 Chevy temp sensor 01/18/2016 12:50 AM In the first design of the 366-427 engine, all coolant monitoring was done by water temperature sensors installed in the intake manifold in the short water runners between the thermostat housing, and the front of the cylinder head. SENSOR DESCRIPTION The knock sensor (KS) system uses a flat response 2-wire sensor. Knock Sensor Wiring Harness. Last monday it came on n hasn't gone out. Unlock the hood and prop it open. The job of the knock sensor is to send a signal to the PCM indicating abnormal noises in the engine that may be occurring, like spark knock. The only way to fix a bad knock sensor is to replace it. So far I have no system too lean codes. 3L V8 Exhaust & Emission Knock / Detonation Sensor. Re: Knock Sensor. What happens is water gets under the upper intake plenum and runs into the rear knock sensor port on top of the engine valley pan. Chevy/Chevrolet Check Engine Light Questions. Once I tore everything down, I found that the rear sensor was rusted. I looked on GMPartsdirect. so all i know is what I've been through with my truck just purchased a 92 88 that I mixed motors in the knock sensor got damaged just like yours and it starts like crap after a few min runs great then if you drive it a while it's like the fuel pump shuts down also I have no oil pressure registering on the gage I know most of it is from that. This may assist in diagnosing the condition. 2010 Chevy Cobalt 2. You can also use your scan tool to check for codes as well as watching the timing changes as you check the operation. 1994-1995 B-Body (Caprice, Impala, Roadmaster, Fleetwood) used 2. org Finding the right Acura Vigor Knock Sensor mustn’t be a hassle. hey guys was wondering if you can help me out, I have a 2010 cobalt LT and the check engine light came on recently so I pulled the codes and p0327 came up and said it might be the knock sensor, a k. WARNING: Do not tap on any plastic engine components. Toyota 1kz Engine Knock Sensor Getting the books toyota 1kz engine knock sensor now is not type of challenging means. 3 i was on my way home from work and my check engine light popped on so i got it checked out and its the knock sensor , how hard is it to replace?, i have quite a bit of mechanics ability would it be something i could prolly do on my own ? any help would be a thanks. What happens is water gets under the upper intake plenum and runs into the rear knock sensor port on top of the engine valley pan. P0327 – Knock Sensor Circuit Performance Sensor 1 P0332 – Knock Sensor Circuit Performance Sensor 2 The technician decided to replace both Knock Sensors. Usually this is the result of improper timing and ignition. Codes are po327 and po332. The PCM will adapt to poor octane fuel and drive for the most part normally with a very slight penalty under hard acceleration. hey guys was wondering if you can help me out, I have a 2010 cobalt LT and the check engine light came on recently so I pulled the codes and p0327 came up and said it might be the knock sensor, a k. A scope can be used to check the operation of the knock sensor. He also did a tune-up and checked the crankshaft position sensor (it was okay). any insight to if the coolent has to be drained and any other tips would be great. 00 coupon applied. Choose top quality brands AC Delco, Beck Arnley, Delphi, Forecast, Standard Motor Products, Walker. Searching I find alot of people are trying to diagnose to actual knock sensor. The crank sensor test in this article is an On Car Test. It is located on the engine block. If the knock sensor checks out OK, but you still have P0325 code illuminated, you'll need to check the sensor circuit. Check the voltmeter for continuity after turning the vehicle on. The vehicle is a 2004 Silverado with a 6. How to Replace Throttle Body Is your check engine light on, displaying the code for the Throttle Position Sensor or TPS? This article applies to the Chevrolet Silverado GMT900 (2007-2013). 1993 to 1997 Camaro and Firebird used 1 knock sensor. So far I have no system too lean codes. I started the car and gathered an initial ALDL scan to check sensors,etc. if its leaking oil from where it mounts all you need is the copper crush washer, I highly doubt the sensor itself is leaking. The MAP sensor can also be used in OBD II (on-board diagnostics) applications to test the EGR (exhaust gas recirculation) valve for functionality, an application typical in OBD II equipped General Motors engines. The sender pump assembly was replaced twice. 3L V8 Exhaust & Emission Knock / Detonation Sensor. 1994-1995 B-Body (Caprice, Impala, Roadmaster, Fleetwood) used 2. is an easier job than you think. Chevrolet Silverado 2007-2013: How to Replace Throttle Body. where is the wire for the knock sensor routed to or at ona 1990 C3500 Chevy dually 2 Answers. I replaced my intake gaskets and since I had the intake off I also replaced both knock sensors. If there is a problem with this, you will need to replace the knock sensor. 3L V8 Electrical-Connector Knock / Detonation Sensor. Diagnostic Trouble Code 43 (OBD-I) or P0332 (OBD-II) can result from a knock sensor circuit or sensor that is faulty. If you are picking up cross talk on the leads from the alternator or something that would cause all kinds of problems. The corrosive buildup causes the code. gm chevy gmc engine knock sensor 2001 2002 gmc sierra silverado 12589867. The tap-with-a-hammer test made the voltage reading increase on the digital multi-meter. However you can not pass if the check engine light is on for any reason. guy at the part store looked at me and said "this motor has two which are under the intake which is a bitch all on its own" so has anyone else encountered having to do this?. Re: Custom knock sensor idiot light? November 4th, 2012, 06:17 AM the frequencies a knock sensor picks up are barely noticable. How to Replace Throttle Body Is your check engine light on, displaying the code for the Throttle Position Sensor or TPS? This article applies to the Chevrolet Silverado GMT900 (2007-2013). These are cheap enough, I just hate to buy them both and never need the second one. Chevy CK Pickup 1990, Ignition Knock Detonation Sensor by Delphi®. Here is how you can test the knock sensor to see if it is bad. It is advisable to check if the knock sensor is in place to prevent any. This is a good check however, I would bet 99 times out of 100 that you have a bad sensor and skip this. I have to uninstall all those components on my car just to get to it. the installation is not very hard, whats difficult is the un-installation, I had to re-install everything when it worked fine. 1997 Chevrolet K1500 4x4 Silverado V8 5. You can also use your scan tool to check for codes as well as watching the timing changes as you check the operation. This OBDII code can put your vehicle into limp mode and most certainly can cause issues in car performance. If the knock sensor checks out OK, but you still have P0325 code illuminated, you'll need to check the sensor circuit. The sender pump assembly was replaced twice. com, symptoms of a bad knock sensor include poor acceleration, knocking noises during acceleration, poor fuel mileage and a visible check engine light. Honda knock sensor p0325. A failed knock sensor will register a trouble code and illuminate the Check Engine lamp (CEL), although some engines will require. The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. the circuit it makes is used to adjust timing and fuel so I would think any resistance (bulb) would delay the signal to make the adjustment. Buy Knock Sensor with Harness Pair Kit Set for Chevy GMC Silverado Sierra Cadillac: Detonation - Amazon How to test chevy knock sensor. Not usually. It will compare this information with its preset tables to identify a valid knock. Engine knock---or "knocking"---is the result of improper combustion in the combustion chamber of your truck. Condition is used. The easer solution is finding a resonant knock sensor to a car with a similar cylinder bore. P0325 is a trouble code indicating that the signal from the knock sensor is not performing in its normal range. I have to uninstall all those components on my car just to get to it. That crazy-looking. This is done in order for the ECM to test the knock sensor. How To Diagnose An Engine Knock. It runs the same when the knock sensor is unplugged, which makes me think the knock sensor isn't the culprit. is an easier job than you think. The sensor takes that information and sends it to the computer, which in turn retards the timing on the engine to fix the problem. The knock sensor detects vibrations that come from a knock or an irregularity in combustion and send a signal to the engine control computer, which then adjusts timing to correct the knock. Unplug the blue knock sensor connector, and then install your new knock sensor and tighten to specification. Turn the engine off and engage the emergency brake. Need more info about Chevy knock sensor I'm having an intermittent CEL with a P0332, Knock Sensor circuit low input Bank 2. Code p0324 After I installed my tune in my sedan I went to data log and did a code scan and found the this code popped up. The design of these turbos is nearly identical to 6. Learn the symptoms of an MAS that needs cleaning, and how to clean it. That does it for our DIY guide on a VQ35 knock sensor and How To Replace one to fix a OBDII P0325 trouble code. So here is the solution that worked great for me and will most likely work great for all of you struggling out there with your AEM EMS and getting the knock sensor to read: Solved: Nothing is wrong with the knock sensor. They can also take a little digging to get to, which makes replacing it the way to go. Knock sensor wire routed into CTS harness. Check out free battery charging and engine diagnostic testing while you are in store. It's giving the code for Knock Sensor Sigal. How to Replace Throttle Body Is your check engine light on, displaying the code for the Throttle Position Sensor or TPS? This article applies to the Chevrolet Silverado GMT900 (2007-2013). • Remove the engine from the vehicle • Some vehicles may need to remove the engine while some may not. Follow the procedure involved with testing this sensor: -Connect tester leads -Tap knock sensor and observe test readings. and when it is cold outside 5-30 degrees it seems like it is misfiring, and sometimes does it so bad it kills, plus a lack of power, and seldom, and random misfiring/hesitation when warm, when i. If you do not have an account but would like to check the status of CHEVROLET 2006 SILVERADO 1500 5. The vehicle is a 2004 Silverado with a 6. GM for a long time in the mid 80's through early 90's made external knock sensor modules that took the raw signal from the knock sensor, filtered and conditioned it, then set the ECU what basically amounted to a digital signal for Knock/No Knock. 3L V8 Exhaust & Emission Knock / Detonation Sensor. The OBDII Trouble Code P0327 / P0328 has to do with the knock sensor in your vehicle, and without this vital information your PCM does not have the ability to detect pre-ignition or knock. I think the knock sensors were put in several locations, but a good place to check are coolant plugs near each motor mount, and the back of the block also. A 3500 ohm resistor in the knock sensor reduces the voltage to about 2. The miss came back and my mileage has been sh!t. 3 flex fuel engine Z71, and I am having an issue with the bank 2 knock sensor. Where are the sensor leads hanging for the knock sensors? The ECM just needs to see a signal from the wire, don't need to be a knock. So here is the solution that worked great for me and will most likely work great for all of you struggling out there with your AEM EMS and getting the knock sensor to read: Solved: Nothing is wrong with the knock sensor. I read everything on here and other places before starting the job. The code scanner showed a code P0327, which is a knock sensor issue. Knock Sensor. I am out of options as far as I know at this point. A failing knock sensor can affect engine performance, slow acceleration, poor gas mileage and eventually cause harm to the engine. The result was a severe low power condition at times. How to tell which or if either knock sensor is bad on a 2005 Chevy suburban 5. Most new GM vehicles use the knock sensor during the first few seconds of operating to test the knock control system. The sensor is located directly above the starter, bolted to the block and is only accessible from under the car. These symptoms are most common when the vehicle is travelling at highway speeds or carrying a heavy load. 3L V8 Exhaust & Emission Knock / Detonation Sensor. the knock sensor was bad and was replaced. A scope can be used to check the operation of the knock sensor. Camaro and Firebird: How to Replace Knock Sensor. Once you know how to check an oxygen sensor, you can verify whether the unit is actually working or in need of replacement. That does it for our DIY guide on a VQ35 knock sensor and How To Replace one to fix a OBDII P0325 trouble code. It is located on the engine block. How to Test a GM Knock Sensor by Russell Wood The knock sensor on your GM engine is designed to sense detonation in the engine that causes a knocking noise from an improper air/fuel/spark ratio How to test a chevy knock sensor. Hard to beat prices on 275hp Certified Knock Sensor!Showcasing a huge collection of 275hp Certified Knock Sensor available for sale today. FAILURE SYMPTOMS Engine knock, loss of power, MIL light. Clip the multimeter lead to the knock. 9K ohm resistor in the knock sensor reduces the voltage to about 2. Specific to: Chevrolet Silverado 1500 2008. I am looking for info on where the knock sensor is, how to test it (with dvom) and a possible part number to replace it with. Camaro and Firebird: How to Replace Knock Sensor. If you do not have an account but would like to check the status of CHEVROLET 2006 SILVERADO 1500 5. A mass airflow sensor (MAS) determines the mass of air entering a vehicle's fuel injection engine, and passes that data to the Engine Control Unit, or ECU. The job of the knock sensor is to send a signal to the PCM indicating abnormal noises in the engine that may be occurring, like spark knock. In technical words, the knock sensor is a piezoelectric sensor which contains a piezoelectric sensing crystal and a resister. The signal's amplitude and frequency are dependent upon the amount of the knock being experienced. Connect the red clamp on the timing light to the positive terminal on the battery, then connect the black clamp to the negative terminal. In this video veteran TV mechanic Scotty Kilmer will teach you how to replace a defective camshaft position sensor on nearly any car. As the name implies, you can get the codes for GM cars or trucks yourself if the model of your vehicle is made before 1995, this means as soon as you see "check engine light" in your dash, you can get the code in minutes if you want. If your LS V-8 powered General Motors Corp. , is guaranteed by GM's limited part warranty. How to Check a Knock Sensor for Continuity Park the vehicle on a level surface. Check out this video to learn how to replace the engine knock sensor wire on your 95-00 Chevy Tahoe. This engine had a slight rod knock or upper engine noise that was causing the knock sensor to record a false signal. Usually this is the result of improper timing and ignition. The vehicle is a 2004 Silverado with a 6. If you are picking up cross talk on the leads from the alternator or something that would cause all kinds of problems. Experts are full of valuable knowledge and are ready to help with any question. MAP and second knock sensor wired into engine-bay and down/thru firewall Black plastic conduit used for all wiring for clean look. If the code is reset, start the engine and use the scanner to observe knock sensor data. Chevy/Chevrolet Check Engine Light Questions. I did have a problem with the battery connection that should now be fixed. It works great. I am just trying to see if the harness from the ECU is good. The Nissan 3. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. How to tell which or if either knock sensor is bad on a 2005 Chevy suburban 5. Reconnect the knock sensor harness and you now know how to replace a VQ35 knock sensor. Diagnostic Trouble Code 43 (OBD-I) or P0332 (OBD-II) can result from a knock sensor circuit or sensor that is faulty. If resistance is low, check circuit for shorted wire or shorted sensor. How Do I Bypass The Knock Sensor On My 93 Chevy 350 It has a fresh rebuild, new plugs, coil, wires, distributor, cam, pistons, headers, and exhaust. Delphi Knock Sensors prevent against engine damage from pre-ignition knocking. any insight to if the coolent has to be drained and any other tips would be great. I started the car and gathered an initial ALDL scan to check sensors,etc. Engine knock---or "knocking"---is the result of improper combustion in the combustion chamber of your truck. If you do not have an account but would like to check the status of CHEVROLET 2006 SILVERADO 1500 5. A P0327 code is Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor). Try to remove the sensor from the block and retest the system if you do not hear a knock. Fix Car Computer Problems and Sensor Issues. I had a "knock sensor low voltage" code P0327. A knock sensor has only one wire going to it, a coolant temp will have 2 for the ecm, only one if its for a guage. I replaced my intake gaskets and since I had the intake off I also replaced both knock sensors. Re: Custom knock sensor idiot light? November 4th, 2012, 06:17 AM the frequencies a knock sensor picks up are barely noticable. A failing knock sensor can affect engine performance, slow acceleration, poor gas mileage and eventually cause harm to the engine. 0L Engines (2003-2008) How To Test The GM Mass Air Flow (MAF) Sensor: 4. First off let me explain the code on your Chev Silverado 1500. If you find that the wiring harness is ok, and the code is still persistently registering, it is time to test and/or replace the knock sensor. My check engine light came on a few months ago and I had the codes read at Autozone. However, this test let you know if the sensor produces any signal at all. 2L GM Engines from 2006 - Up), Indmar Part# 551392 or S551392, Not Used on LCR, LTR other Indmar Low Cost motors. Unfortunately, it's a common occurrence for a Nissan knock sensor code to set on some of the automakers most popular engines and model automobiles. GM for a long time in the mid 80's through early 90's made external knock sensor modules that took the raw signal from the knock sensor, filtered and conditioned it, then set the ECU what basically amounted to a digital signal for Knock/No Knock. Older Ford cars and trucks are starting to see increased failure rates of the fuel rail pressure sensor. All the knock sensor does is sit there and listen and constantly report back to the ECU. 1998 Chevy K1500, 5. m (15 lb ft). Open or short in knock sensor circuit or loose connector. Manufactured to meet or exceed OE requirements. very expensive job. 3 flex fuel engine Z71, and I am having an issue with the bank 2 knock sensor. Test two determines the state of the 5 volt reference voltage applied to the knock sensor circuit. Knock Sensor. The purpose of this test is to evaluate the operation of an engine piezoelectric knock sensor when subjected to a simulated engine knock. The commonly used measurement technique is to put an AC voltmeter across the output of the knock sensor and the take a hammer & extension to beat on the block (to create an artificial knock) and see if the knock sensor produces an AC voltage in response. Knock sensor detects detonation and lets the computer know to retard timing to protect the engine. Today I hooked it up to a scanner and read knock sensor. The miss came back and my mileage has been sh!t. 5 volts already applied. I have a 1999 chevy silverado with a 5. The knock sensor is located on the right side of the block down by the starter. Diagnostic Procedure (3. 5V), then it will trigger a P0327 Chevrolet DTC.