Trouble CodeFault LocationProbable Cause
P0332 Knock sensor (KS) 2, financial institution 2 -low intake Insecure KS, bad connection, wiring brief to earth, KS erroneously tightened, KS, ECM

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What Does password P0332 Mean?

The hit sensor (KS) is an installed in the engine and also is supplied to finding spark knock. Once there is spark punch or pinging, the sensor to produce a voltage signal the is sent to PCM. The PCM will then retard ignition time to defend the engine.

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Inside, the hit sensor is a piezoelectric crystal. This decision is used come produce AC voltage under vibration. The punch sensor is a form of transducer, i m sorry is a device that converts alters in physics quantity into an electrical signal. In various other words, a punch sensor go not receive a recommendation voltage native the PCM – it creates its own.

There space two simple types of hit sensors: the style used in larger vehicles and the resonant style used in contemporary vehicles.

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Cross ar of a typical knock sensor

(Courtesy: azosensors.com)

P0332 stands for knock sensor low input. This way the PCM has actually detected a problem with the hit sensor or that is circuit. Part vehicles may be equipped v two hit sensors. Code P0332 involves the sensor on financial institution 2 (the opposite next of the engine where the #1 cylinder is located).

What are the common causes of password P0332 ?

To sum things up, the common reasons for code P0332 are as follows:

Failed punch sensorFault in the knock sensor circuitFailed PCM

What space the symptoms of password P0332 ?

You may notification a lack of power, suspicion and/or pinging. In some cases, however, one illuminated inspect engine light will certainly be the only symptom.

How carry out you troubleshoot password P0332 ?

The following steps will aid you troubleshoot a P0332 code:

Perform a visual inspection of the sensor and connection.

Many difficulties can quickly be discovered in the harness and also connectors. So, start your diagnosis by visually inspecting the sensor and also its connection.

Perform a straightforward test that the punch sensor

Note that this test will certainly only work-related on old format knock sensors. Affix a timing irradiate to the vehicle and also start the engine. Permit the engine to heat up and aim the time light towards the timing marks on the harmonic balancer. Locate the hit sensor and tap on one engine place near the sensor (do not directly strike the sensor). If the sensor is functioning correctly, you have to see the timing begin to retard. If not, you have a trouble with the sensor or that circuit. Hint: this test can also be perform by surveillance the ignition time on a scan tool, rather of using a timing light.

Test the sensor output

If your vehicle fails the an easy test noted above, the time to determine what part of the sensor circuit is come blame. To check an old-style knock sensor, affix a digital multimeter collection to AC voltage between the knock sensor calculation signal wire and also a great ground. Then once again, madness on an engine location near the sensor. You have to see an AC voltage reading on her digital multimeter. If not, the sensor is bad and also should be replaced.

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An old-style punch sensor

(Courtesy: autobarn.net)

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Testing one old-style hit sensor

(Courtesy: youtube.com)

To check a automobile with a resonant style sensor, you’ll attach your digital multimeter the same method as you would certainly for a Weidman format sensor. But, instead of tapping top top the engine block, you’ll start by removed the fuel pump relay to stop the engine indigenous starting. Crank the engine, placed the car in gear and also keep your foot top top the brake. Advice a little; together the automobile is starved because that fuel the will begin to ping and also you need to see an AC voltage output. If not, the knock sensor is bad and also should be replaced.

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A resonant format knock sensor

(Courtesy: msextra.com)

Check the circuit

If the knock sensor checks out OK, however you still have P0332 code illuminated, you’ll require to inspect the sensor circuit. Utilizing a digital multimeter collection to the ohms, connect one next of the meter to the harness next of the knock sensor connector and the other to the hit sensor input pin on the PCM. This tests because that continuity in between the sensor and also PCM. If her meter reads OL, there is an open somewhere in the circuit that need to be repaired. If not, the PCM is most likely the problem and should it is in replaced.

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Typical old-style knock sensor circuit

(Courtesy: alldata.com)

While old-style punch sensors ground through the sensor itself, resonant style sensors typically have a separate ground circuit. In this case, you’ll desire to use a digital multimeter to ensure there is a an excellent ground before condemning the PCM. Start by consulting the wiring diagram because that your vehicle to recognize which pin on the connector is power and which is ground. Next, attach the red multimeter cause the battery positive terminal and also the black bring about ground. You have to see a analysis of about 12 volts describe a great ground. If not, you’ll have to consult the ground side of the wiring diagram to uncover where the circuit fault lies.