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How will I know if the knock sensor is connected

A miss and a ping sound

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  • Cars & Trucks Master
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Get the OBD codes read if vehicle newer than 1996

Posted on Nov 21, 2014

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Posted on Jan 02, 2017

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SOURCE: 94 Buick Regal 3.8. Pings under load. All

Remove and inspect the spark plugs for heavy deposits or glazed-looking interior insulators. Make sure the plugs are the proper type for this engine. Heavy carbon build-up in the cylinder heads will cause pinging. If the ignition system is too advanced, it will also cause problems. Try a different brand of fuel. High engine temperatures can do the same (caused by poor cooling system or lean fuel/air mixture). If the check engine light is on, take the car to Autozone or a similar business that offers a free scan of the computer. This may provide additional clues. Hope some of this helps!

Posted on Apr 08, 2010

rfoulds85
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SOURCE: ls1 motor has a tip

You should take it in or if you know how check the timming on the vehicle if the timming is out it will cause this.There could also be a dead cylinder causing this problem is the check engine light on? Could be caused by a bad plug or wire.

Posted on May 04, 2011

emissionwiz
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SOURCE: 2005 Silverado OBD code P0332 Knock sensor

Yes it can cause ping.

Posted on Jun 14, 2012

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SOURCE: 97 sierra fast rough idle, no power, severe knocking

Ok it seems to me like you may have to do some electrical checks, perhaps some voltage checks/drops in order to find out. For the P0118 you could use your scanner provided it can read live data. Look at the coolant temp snsr (cts or ect) and read its value it should read close to intake air temp snsr (IAT) value. The unplug the sensor value should change drastically and go negative. The jump the Two terminals and temperature should go high. If it does you've you've eliminated the circuit and the sensor it faulty. Make sure you have 5v reference as I said before you may have to voltage drop the circuit to make sure you're not loosing any voltage and that the circuit is intact. Good luck! Here are some links with more info and possible causes. http://www.obd-codes.com/p0118 http://www.obd-codes.com/p0507

Posted on Jun 16, 2012

airjer995
  • 5332 Answers

SOURCE: my 1992 300zx is making a pinging sound when pressing on gas peddal

Try this. Burn off your current take of gas, get it down to a quarter tank or so. Fill up with premium gas. If the noise goes away it is probaly a condition known as ping. Which is the predestination of the air fuel mixture in the combustion chamber. This can be caused by carbon buildup and could be resolved with an upper intake and valve cleaning. If the noise persists it is most likely a mechanical engine noise, an experienced ear will be able to tell you what the noise is.

Posted on Aug 11, 2012

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How to prevent engine knock on 92 Ford Thunderbird Lx


The sensor helps to monitor the engine performace, and when it detects knock or pinging. It sends a signal to the PCM which in turn adjusts the timing and fuel ratio to reduce or eliminate it in those situations you have knocking. Low octane, bad gas, carbon deposits and heat will contribute to pinging. It's best to replace the sensor if you know it is faulty to avoid damage to the engine.

Jan 30, 2016 | Ford Cars & Trucks

1 Answer

2003 chrysler concord nocks pings left side


Knocking and pinging are two separate things. "Knocking" usually refers to the sound an engine makes when internal mechanical parts, such as piston rod bearings or connecting rod bearings, begin to wear and cause a deep "knock, knock, knock" sound during engine rotation. "Pinging" refers to the tapping sound you get upon acceleration, either when using fuel that is to loo octane for the vehicle, or when static timing is set too far advanced, or when the cylinder heads are overheating due to clogged water channels or thin oil.
If you are hearing KNOCKING on the left side, it is likely time for an engine rebuild. If you are hearing PINGING, you may need a better grade of fuel, or you are way overdue for either an oil change or a major tune-up.

May 10, 2015 | 2003 Chrysler Concorde

1 Answer

I have a 2003 ford focus that I have a pinging engine sound during acceleration or going uphill. The car also hesitates while driving at a steady speed on a flat road. It will also just stop (maybe 5-10...


Hello, Thomas. Check the knock sensor. This sensor is suppose to send signal to the computer if the engine start to knocking or pinging. The computer will change the setting on various other components to keep from doing this knocking or pinging. I remember in the older cars that weren't fuel injected but carbureted and had to burn high octane fuel. If one put low octane in the fuel tank the engine would knock/ping, and continue to run after the ignition was turned off. Try the knock sensor or do an diagnosis test on it. Look in your owner manual it tell how to self diagnosis test on you car. GB....stewbison

Sep 07, 2011 | 2003 Ford Focus

1 Answer

Where is the knock sensor located and what does it look like?


Your vehicle is equipped with 2 knock sensors. They are located on the cylinder heads under the intake manifold. They look like the picture below.

NOTE: Most knock sensor codes are caused by mechanical problems with the engine like pullies that are "rattleing" or lifters that are "tapping" etc. The knock sensor does not know the difference between "ignition ping" and mechanical problems like those mentioned. Knock sensor codes set when the engine computer has retarded the ignition timing as far as it can in an effort to stop ignition ping and the knock is still present. This is usually because the problem is not caused by ignition ping.

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Feb 22, 2011 | 1994 Lexus Es 300

2 Answers

I have a 2002 chevrolet blazer with a 4.3, 4dr, 4wd. Service engine soon light came on, took it to the auto part store to code it they said knock sensor, 02 sensor, low evap voltage or something close to...


No I don't think so, knock sensor only work under engine load, when sensor picks up a ping or knocking, it will adjust timing, o2 sensor could be bad, and will save you fuel mileage, but a miss will also give you an o2 sensor code, running rich, have him check for cylinder miss first.

Aug 13, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

Knock sensor


It allows the engine to run with the ignition timing as far advanced as possible. The computer will continue to advance the timing until the knock sensor detects pinging. At that point the computer retards the ignition timing just enough for the pinging to stop.
A knock sensor assures that you're getting as much power and fuel economy as is possible from your engine.


knock sensor
The knock sensor responds to spark knock caused by Pre-detonation of the Air/Fuel mixture. As the flame front moves out from the spark plug ignition point, pressure waves in the chamber crash into the piston or cylinder walls resulting in a sound known as a knock or ping. This is caused by using a fuel with a low octane rating, overheating, or over advanced timing. Sometimes it can be caused by hot carbon deposits on the piston or cylinder head that raise compression. A knock sensor is comprised of Piezoelectric materials; Crystals that when impacted, generate a voltage (same idea as a BBQ ignitor). This voltage is monitored by the computer, and when an irregularity is detected, the computer corrects timing in VVT (variable valve timing) engines, or triggers a DTC Diagnostic Trouble Code) in older vehicles.

Apr 23, 2010 | 1998 Honda Accord

1 Answer

I have a 2002 grand marquis,140 thousand miles...i change my oil on the regular,i take good care of the car..my problem is on my last oil change i noticed a slight tapping noise like the valves where...


a knock sensor is basically a resistor and a spring, and what it does is it reduces valve ping. Valve ping is when the fuel is not properly burned and tries to explode before the valve is fully closed and it will make a pinging noise when under load or at higher RPM. If the sensor is bad it can cause detonation, detonation is when the fuel explodes before the valve is closed and can cause a cracked, or exploded piston, bent valves etc. Your problem does not sound like that of a bad knock sensor, predominantly you will only hear the "ping" under load and not at idle and if it was bad your check engine light should be on. this sounds more like a rod knock. change the oil again and use only AMSOIL and an amsoil filter, amsoil is proven to last longer than any other oil, 600,000 miles without a change, or a filter change.

Feb 05, 2010 | 2002 Mercury Grand Marquis

1 Answer

My check engine light is on on my 98 nissan 200sx


the knock sensor tells the car's on board computer/PCM that the engine is pinging/knocking from poor fuel or the wrong octane or other engine related faults, they seldom fail, most likely the connector to the sensor is making a poor connection, the knock sensor is located on the engine block, it screws into th water jacket, do u hear any engine ping or spark knock?.

Dec 21, 2008 | 1998 Nissan 200SX

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