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Knock sensor 2008 gxp prix

My "check engine" light keeps coming on and off. It has thrown a knock sensor code each time. I completely replaced the knock sensor and it is still coming on and off. It gives four reasons: 1) Sensor has gone bad. 2) Wiring to sensor needs to be checked. 3) Rattle or Knock in motor. 4) Low fuel pressure. What is the problem here? I drive the card EXTREMELY HARD at times and am preoccupied with any potential damage that may occur. These cars are MADE to be driven at a more aggressive level. Why make them perform if they can't take it? I keep on top of all mainenance and by no means neglect it in any way. Any help is appreciated.

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: 2002 Hyundai Sonata wont pass smog

CA you can take the car to a referree and get a one time waiver if you have spent a minimum of $450 on repairs not including smog fees. Gives you two years to get it fixed. Smog Referee Call Center
Toll Free: 1.800.622.7733
You can also sell the car to the state for "up to" $1,000

Posted on Feb 01, 2009

  • 120 Answers

SOURCE: 1999 Mazda Millenia Check Engine light

it picks up nois inside of the motor it is located in the side of the block under the intake sometimes right above the starter

Posted on Feb 21, 2009

SOURCE: 1996 Nissan Maxima 2.5 V6 Engine Knock sensor

The knock sensor is a major pain in the a..s to change I would suggest taking it to a reputable shop for a second opinion to see if they realy performed the work. Also with OBD11 (2) diagnostics if you have multiple misfires its not the wires its something else, also if you got a code for a misfire it would be specific as to which cylinder is misfiring. My best guess would be to get your coil checked.

Posted on Mar 18, 2009

Testimonial: "Excellent "

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SOURCE: 2003 Tahoe, 5.3 liter vortec flex fuel. Engine

this is a comon problem on chevy 00-06 models a computer ground ,it seems ok at sight but inside it's just holding a few wires ,get under the car on the driver side passenger there you should find a two ground wire goin to the block a big, and a small ,the small one gets coroded try to fix it and let me know how it goes ok.

Posted on Feb 25, 2010

  • 1374 Answers

SOURCE: 2005 Toyota Camry - knock sensor

Your sensor went off because it overknocked.
Try using a different type of fuel with a higher octane.
Erase the code and use the better gas. if it comes back then we will worry about replacing it.

Posted on Apr 14, 2010

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I have an 08 grand Prix the knock sensor has gone bad (bank 2) it's in between the engine and transmission, is it possible to replace it without removing the transmission?

What code did you pull ? How do you know it's bad ?
Remove the transaxle. Refer to Transmission Replacement for the 4T65-E transmission. Drain the cooling system. Refer to Cooling System Draining and Filling . Remove the bolts (2) from the knock sensor heat shield (1). Disconnect the knock sensor electrical connector (3) from the knock sensor.

Sep 14, 2016 | 2008 Pontiac Grand Prix

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Reduce power light on 08 grand prix

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2008 grand prix gxp. It keeps blowing my emissions 1 fuse. When that fuse blows this is what happens ...

Apr 16, 2015 | 2008 Pontiac Grand Prix

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Hi, At cold start my Accent 2008 is knocking since apprx. a month, i went2 times and dind t hear it ! at the third times the light '' check engine'' went on . teh code of knock sensor

If you detected the engine knocking and the knock sensor also detected it to the extent it caused the ECM to set a diagnostic trouble code (DTC) then simply replacing the knock sensor was a waste of time and money, a case of shooting the messenger because you don't like the message. If the car is under warranty or guarantee then take it to the dealer for complete diagnostics. Do not under any circumstances be put off by lame explanations that they can't do anything. Take the car to other dealers to get written reports on the car. It is very important to get the reports in writing as this gives you legal protection with regard to the guarantee.

Apr 29, 2017 | 2008 Hyundai Accent

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Pontiac grand prix high beams work but not low beams

I have a 2008 Pontiac Grandprix GXP I had hit a deer in May the repairs were made in June of this year. Here is my problem the air bag light comes on while I'm driving the car and now I have no low beam lights. I have taken the car back to where the repairs were done, cause I think the problems are from the damages. I was informed today that there's no juice from the fuse box to the low beam switch. What would cause this?

Jan 02, 2012 | 2007 Pontiac Grand Prix GXP Sedan

2 Answers

2006 pontiac gxp , check engine light is on codes po431, 430 cam sensor circuit, runs fine clear codes and returns in 2 days !

Congratulations! You have discovered that clearing codes without diagnosing and repairing the problem that caused the code only results in a repeat repair! You now know more than half of the "mechanics" out there.

OK, on a more serious note: First we have to get the codes straight or get the car straight...I'm pretty sure it is the code that is not correct....Code P0431 and/or P0430 are not valid codes for a 2006 Pontiac Gran Prix GXP. Those are evaporative emissions system codes that do not apply to your car. However, since you mentioned "cam sensor circuit", I will assume at this point that you meant to say P0341 and P0340....BIG DIFFERENCE!

The next problem is that although they are very similar, the troubleshooting charts are different depending on whether your GXP is equipped with a 3.8L engine or a 5.7L engine. If you want help with a problem like this it is REALLY IMPORTANT that we know what we are working on. Otherwise, you may get some VERY GOOD information that does not apply to your vehicle and the "expert" will probably be thought of as "incompetent" for giving you bogus advise. Then comes the bad ratings, and no testimonials, etc. and it wasn't the expert's fault he didn't have the correct information to work with!
It's just not FAIR!!!


For either engine, Diagnostic Trouble Code (DTC) P0341 is not necessarily a "Circuit" problem. Although it may be) This code is usually caused by mechanical failures - See the list below.

1. The PCM detects the following every 2 engine revolutions:
. A. 36 medium resolution engine speed signals
. B. 6 low resolution engine speed signals
. C. More than 1 cam sensor signal (herein lies the problem - there should be only one)
2. The conditions in item #1 above are met for at least 4 consecutive seconds.

When the conditions above are met, the PCM sets a "Pending" code for the current drive cycle. On the second consecutive drive cycle that that the same conditions occur, the PCM will store a memory code and turn the Service Engine Soon or Check Engine light on. This explains why it takes a couple days for the light to come back on...It takes a minimum of 2 drive cycles to turn the light on. If it fails on this drive cycle, and not the next, the counter starts over. It could conceivably take weeks or even months for the thing to fail two times in a row if it is an intermittent problem.

If it is failing on a regular basis, the conditions (or causing symptoms) can be verified by using a lab scope and tracing the cam sensor signal and the medium or low resolution engine speed signal. Just count the pulses - if there is more than one cam sensor pulse for every 6 low resolution pulses or 36 medium resolution pulses, the problem has been verified. Now, to find the actual CAUSE so we can fix it.

The most common cause of this is miss-routed or bad ignition (spark plug) cables that are "spiking" the cam sensor circuit.

This code can also be caused by:
Camshaft reluctor ring damage
The cam sensor coming into contact with the reluctor ring
foreign material passing between the reluctor ring and the cam sensor.
Wear or damage to the timing chain, timing chan sprockets, or timing chain tensioner
Excessive camshaft end play

Now DTC P0340 is really the opposite problem.
If your car is setting both of these codes at the same time, you have a really erratic cam sensor signal that should be VERY easy to verify with a scope.

DTC P0340 sets under the same conditions except instead of having more than 1 cam sensor pulse, there are NONE.

This code is usually caused by the cam sensor itself, however it can also be caused by the circuits to the cam sensor. The integrity of the circuits should be verified before replacing te cam sensor for this code.

Apr 20, 2011 | 2006 Pontiac Grand Prix

1 Answer

I have a 2008 grand prix gxp v8 and i was driving and it stalls on the highway with engine light coming on and car shutting off. The code are map, maf, sensor! car starts and stalls out right away u can...

Hi, you can try cleaning the MAF sensor, but you probably need a new one. Fortunately you can get one for only $70 at autozone. This is cheap compared to other MAF sensors I've seen.
First check the connection on the sensor. If good, remove the sensor and spray thru the mesh with electric parts cleaner. Reinstall and see if it's any better. If not, replace the sensor.
Not sure if the MAP sensor is bad or not. Can you tell us the exact codes you got, as there are several different ones for each sensor?

MAF sensor:


Jan 11, 2011 | 2000 Pontiac Grand Prix

1 Answer

1990 grand prix 3.1 computer code 43

engine code 43 - electronic spart timing problem- possible knock sensor problem.. check for 5v at knock sensor wire.. if it has 5v then probably need a knock sensor.

Apr 12, 2010 | 1990 Pontiac Grand Prix

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