Question about Jeep Wrangler

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Check engine light keeps coming on...test says its from the knock sensor...sensor has been replaced, but check engine continues to come on...have always used premiun gas...do have a airaid cold air intake..2009 jeep wrangler with 8000 miles

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Where is the knock sensor located on a 2009 dodge journey

Posted on Aug 03, 2012

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It could be that the wiring to or from the knock sensor has a prob. also after the knock sensor was changed was the code cleared? if it was not it may be a inactive code that stays in the computer causing the light to stay on...

Posted on Aug 01, 2009

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Ok had the codes come up for both crank sensors on our Pontiac Montana and knock sensor, replaced all three sensors cleared codes and the check engine light keeps coming back on after clearing codes, for...


I guess you do not know that OBD Codes have
nothing to do with replacing parts

The Codes are used along with the diagnostic
info & charts to check the system that set the codes

Only component testing will find a problem

You used the name of a codes to replace a part
with a similar name

I would guess you did no testing & have no idea why the
fault codes were set, so you found no problem, thus you
fixed nothing & the MIL Lamp is still on

You Cleared ALL DATA needed to help diagnose the issues

You lost your codes & freeze frame data at the time the codes
were set & your lost your emission monitor data

Now you get your codes & write them down
Google the codes & study the possible cause
& solutions

TYPE: OBD & your codes

Need to study OBD Vehicle Systems

Oct 16, 2014 | Cars & Trucks

1 Answer

I replaced the knock sensor, what else could be causing acceleration problems on hills?


The knock sensor code does not always mean the sensor is faulty.
The sensor picks up noise and vibration in the engine such as a spark knock would generate, and the computer slows down the spark timing to fix it. If the noise or vibration continues, the code is set.
Could be a noisy valve, or a problem with the crankshaft or other component.

Aug 13, 2012 | Cars & Trucks

1 Answer

Engine check light keeps coming on and stays on.i had the car diagnosed the mechanic said that the knock sensor is dad and i need to get a new knock sensor so i bought a new knock sensor put it in and it...


did you have the check engine light reset after replacing it? if not then go to auto zone, and let them know you replaced it and need to reset the trouble light for the check engine light... hope this helps...

Apr 14, 2010 | 1995 Toyota Corolla

1 Answer

1989 K1500 GETTING CODE 43 NEW ENGINE REPLACED KNOCK SENSOR AND THE CONTROL MODULE.


The 43 is the knock sensor, the wires must be broken or fused together to continue to get the same code.
Testing the sensor for the DIY Knock sensors detect detonation ( knocking ) by reacting to the ping by retarding the ignition timing so you will need a timing light for this. connect the timing light and locate the knock sensor, ( many are on the intake manifold ) now use a metal object to tap ( not too hard and not on the sensor itself ) on the intake manifold ( light tapping should suffice ), if the sensor is functioning you will see the timing ******. If the timing does not ****** you will need to check voltage across the terminals of the knock sensor connector.
Though that excerpt says your sensor is in the intake,I believe yours is in the water drain hole for the engine block.
I also found that most shops are to replace the wire to the knock sensor because of so much failure of those wires because of heat.
Enough information?Repost if this doesn't help and we can look at some other things to try.

Jan 17, 2010 | 1996 Chevrolet C1500

1 Answer

Toyota Camry Knock Sensor Problem The top of the radiator on my 1993 3.0 lt Toyota Camry V6, 3VZ FE engine split some months back and it overheated. I have since sorted out the head gaskets and it seems to...


Hello. You have posted an excellent question.

The code 55 you are getting, in Toyota terms, as as follows:

"No number one knock sensor signal to the ECU fo four crank revulutions under these 2 conditions: Coolant temperature 140 degrees F or more; Engine speed between 1600 and 5200 RPM."

This indicates a failed (or a loose) knock sensor on the Right Bank of the engine. Since the knock sensor is basically a piezo-electric crystal, not continuity test can be performed with the intake manifold installed.

You can check the continuity form the Knock Sensor wires to the ECM, but, this may not prove useful to you.

Unfortunately, you are going to have to pull the intake, and check the knock sensor wiring integrity. If the connector is good, and the sensor is tight, I would suggest replacing the sensor. Actually, if you were in my shop, I would suggest replacing them both, as the whole intake will have to come off if the other sensor fails. Better to replace them both at once, than to pull the intake again.

We here at FixYa hope that this helps you out, and saves you some future reoair dollars. Thanks for choosing FixYa for advice.

Jan 08, 2010 | 1993 Toyota Camry V6

1 Answer

Where is the knock sensor and how do you replace


The knock sensor is most likely ok you need to do a top engine clean to get the combustion chamber presure down so the knock sensor can ****** the timing enough to not knock or ping, You may not here the ping but the knock sensor does. Go to a GM dealer and buy a can of top engine cleaner warm the engine up and pull vacuum line off the back of the throttle body and allow it to **** the full bottle into the engine then kill the engine. let sit for 20 minutes hook up vacuum hose start the engine and rev it up to where it will still run let it run for 10 minutes till smoke clears out then take it for a test drive after you drive it 10 or 15 miles you should notice the check engine light not cumming on and the engine ill run smoother and the fuel millage will go back up, afterwords change the motor oil and filter to get rid of all the carbon down in the oil pan. If this does not fix it then change the knock sensor, it has 4 wires running to it and is on the side of the block left side. If you replace it be sure not to tighten it to tight if fact use a tork wrench to tighten it or you will break the ceramic disc inside the sensor.

Oct 09, 2009 | 2002 Chevrolet Silverado 1500HD

1 Answer

KNOCK SENSOR KEEP GOING OUT


Make sure you are not over torquing it. if you screw it in to much, it will give false readings and if it is not screwed in enough, it will also give false readings.

There's a delicate balance to be known and, if this sensor is over torqued or, not torqued enough, it will malfunction.

May 24, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

Check engine and engine noise on 1995 Nissan altima


This car does not have a timing chain, it has a belt. The reason your knock sensor and O2 sensor is coming on is likely because your timing belt has stretched which caused it to jump time. Since the engine is not properly timed the fuel mixture is off and the engine is pinging/knocking and that is why the knock sensor is coming up. The sensors are doing their job and keeping the engine from blowing. You should put a timing belt on the car ASAP. I recommend changing the tensionors while you are at it.

Apr 10, 2009 | 1995 Nissan Altima

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