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Causes engine knock - BMW Motorcycles

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Will a bad knock sensor make a knocking noise in the motor

The simple answer is NO, they are there to detect engine knock (pinging) caused by to much ignition timing or not enough fuel (engine running lean). If your knock sensor or sensors are not working the ECU will run the engine in a rich (more fuel) and retarded ignition which will cause a small loss of power and the engine will use more fuel.

Oct 07, 2016 | Cars & Trucks

1 Answer

What is engine knock and what causes it?

Engine knock is the state when crankshaft bearings are no longer the specified diameter and that is characterised by a knocking sound coming from the engine, hence the term "engine knock". It is caused by bearing wear. Bearings wear with time but wear is accelerated by using bad oil or running engine without o

Aug 09, 2013 | Cars & Trucks

1 Answer

Po325 code on 97 nissan maxima

P0325 NISSAN - Knock Sensor Circuit Malfunction
Possible causes- Faulty knock sensor
- Knock sensor circuit short to ground
- Knock sensor circuit short to power
- Knock sensor circuit open
- Faulty Engine Control Module (ECM)

Read more:

Oct 14, 2012 | Cars & Trucks

1 Answer

2000 silverado knock sensor issue

I think it not real probable that the cause of your knock sensor code is the result of bad gas. However, I suppose it IS possible. Most knock sensor codes are caused by engine mechanical problems like bad pully bearings, loose timing chains, broken valve springs, collapsed valve lifters, etc. that would cause a "knocking" or "tapping" in the engine.

The next most probable cause would be damaged knock sensor wiring. I have fixed many that have had damage from rodents getting into the engine compartment and chewing on the wires. Depending on which engine your Silverado is equipped with, the knock sensor could be mounted between the cylinder heads in the valley under the intake manifold. Mice like it under there.

Then again, it all depends on WHAT KIND of knock sensor code you are getting. For 2000 Silverado there are 3 possible knock sensor codes: P0325, P0327, P0332. The diagnostics (and possible causes) change depending on which code you have.

Jan 06, 2012 | 2000 Chevrolet Silverado 1500

2 Answers

Car is knocking and was low on oil cold it be the knock sensor out no oiland water mix in the oil

did the oil light come on? it it did that means a low pressure situation which can cause con rod bearing damage. the knock sensor can cause that too.

Sep 25, 2011 | 2001 Dodge Stratus

2 Answers

I have a 95 oldsmobile 98 regency elite I cant find where the knock sensor goes I have a haynes manual but where it shows it wont go

Well, for starters, your problem got posted under 1985 Oldsmobile 98 - then you said it was a 95 Oldsmobile 98 Regency Elite (HUGE difference between 85 and 95)...then it would be REALLY nice to know which engine we are talking about.

I'll just go with what you said last: 1995 Oldsmobile Regency Elite (Two engine possibilities)

If you have the 3.8L Supercharged engine (VIN CODE "1") it is on the left side of the engine near the oil filter.

If you have the non-supercharged 3.8L (VIN CODE "K") there are TWO of them. One is near the oil filter and the other one is in about the same location on the other side of the engine block.

Please also note that MOST fault codes for knock sensors are not caused by the knock sensors themselves. (they do fail, but it is very rare.) Usually there is either a wiring problem to the knock sensor, or the engine has internal problems causing a "knocking" or "ticking" noise which causes the engine computer to "think" that there is a problem with pre-detonation causing an "ignition ping". The code sets when the computer has retarded the ignition timing as far as it can and the "knock" or "ping" does not go away....usually it doesn't go away because it is not caused by ignition timing. The knock sensor is just doing its job and reporting the knock. It does not know the difference between a knock caused by ignition and a knock caused by internal engine problems.

Jun 28, 2011 | 1985 Oldsmobile 98

2 Answers

Remove the spark knock sencer on a 1997 dodge caravan

It depends on which engine your Caravan is equipped with. The knock sensor on the 2.4L engine is on the forward side of the engine just below the intake manifold. On the 3.3L and 3.8L engines it is on the forward side of the engine right next to the oil filter. All engines: Disconnect the electrical connector and unscrew the sensor from the engine block. Reverse procedure to install.

It should be noted that knock sensor failures are very rare on these vehicles. Most knock sensor fault codes for these engines are usually caused by mechanical problems that are creating "rattling" or "knocking" noises in the engine compartment. Things like bad pulley bearings, worn water pumps or loose timing components are most likely at fault. The knock sensor does not know the difference between vibrations caused by these type of failures and those that are caused by ignition ping. The fault code usually sets when the noise or "knock" is still present when the Powertrain Control Module (PCM) has retarded ignition timing as far as possible. If any knocking or rattling noises are present in the engine area, this should be diagnosed and repaired before replacing the sensor. (Otherwise you will only be wasting your money.)

Jun 11, 2011 | 1997 Dodge Caravan

1 Answer

I have a 04' Chev, 6.0L. Engine light came on, fault code came up PO332. I'm afraid the KS's are under the intake. Is there any way to test the KS to see if it is bad, or is there another problem that is...

P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Powertrain Control Module (PCM) or Engine Control Module (ECM).

Causes for P0332 DTC:
- Knock sensor circuit short to GND.
- Knock sensor circuit short to PWR.
- Knock sensor circuit open.
- Damaged knock sensor.
- PCM or ECM failure.

- Repair or resecure the harness or connector.
- Replace the knock sensor.

Your best bet is to just replace the knock sensor for sensor 2 bank 2. Call Auto Zone with part number SU1282 this is the OEM replacement.

The knock sensor looks like this:



Mar 09, 2011 | 2004 Chevrolet Silverado 2500 Crew Cab

2 Answers

I had the instrument cluster replaced in my 2000 windstar and now the engine is knocking.Engine light comes on for about three days and then it goes off.What could be wrong with my vehicle?

I don't think your gauge cluster has anything to do with your engine knock. I do, however, think that your engine knock has something to do with your check engine light. Start by checking your oil level. A knock could be something simple, or it could be something serious. Unfortunately, it's almost impossible to diagnose a 'knock' without being able to actually HEAR it first-hand, so I'll just throw you a few bones. If you live in a colder climate (especially this time of year) you might want to ask a certified mechanic what weight oil you should be running. A lack of oil to the top end of the engine could cause a knock. Bad gas could cause a knock (fill tank at a different station than the last one you went to). A timing issue could also cause a knock. If the knock persists or gets worse, take it to a mechanic for a diagnosis immediately. If the simple fixes don't do it, it won't get any better on its own.

Nov 18, 2010 | 2000 Ford Windstar

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