Where is the knock sensor and how do you replace

knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor on Bank #1 is generating a low output voltage (perhaps under 0.5V), then it will trigger a P0327 DTC. This P0327 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0325, P0326, P0328, P0329, P0330, P0331, P0332, P0333, and P0334.

Read more at: https://www.obd-codes.com/p0327

Code P0327 indicates that the readings from the #1 Knock Sensor circuit are too low, is outside of its operational window and malfunctioning. Symptoms

• Check Engine Light will illuminate
• Engine pings on accelration
• Engine may be running hotter or colder than normal
• In rare cases, the engine may not exhibit noticeable symptoms

Common Problems That Trigger the P0327 Code

• Defective Knock Sensor
• Defective Knock Sensor Circuit or connections
• Defective EGR System
• Malfunctioning Cooling System
• Rich air/fuel ratio

Common Misdiagnosis

• Knock Sensor replaced when cause of code P0327 was a cooling system problem
• Knock Sensor replaced when cause of code P0327 was an EGR system malfunction

P0332 DTC Code - Knock Sensor 1 Circuit Low Input (Bank 2)
A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged.

The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor on Bank #2 is generating a low output voltage (perhaps under 0.5V), then it will trigger a P0332 DTC. This P0332 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0325, P0326, P0327, P0328, P0329, P0330, P0331, P0333, and P0334.

You may notice drivability problems including fluctation engine RPM, a loss of power, and perhaps some hesitation. There may also be other symptoms.

Potential causes for a P0332 DTC include (but are not limited to):
The knock sensor is faulty and needs to be replaced
There is a wiring open/short/fault in the knock sensor circuit
The PCM/ECM has failed

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Jose.

you sure you got the correct knock sensor, didnt go with a cheap autozone one

Your battery has nothing to do with these codes. Your vehicles computers have detected a malfunction or failure in the system. This triggers these codes and sets your check engine light. Below I have listed the code meanings and some repair solutions.

P1126 - Throttle Position (Narrow Range) Sensor Circuit Malfunction.

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.

Possible Causes For P1126:
- Harness or connectors (Throttle control motor relay circuit is open)
- Throttle control motor relay


P0325 - Knock Sensor Circuit Malfunction

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 Electronic Control Module (ECM).

Possible Causes For P0325:
- Knock sensor circuit short to ground.
- Knock sensor circuit short to power.
- Knock sensor circuit open.
- Damaged knock sensor.
- Damaged PCM or ECM

Possible Solutions:
- Repair or resecure harness or connector
- Replace knock sensor Bank 1 (Bank 1 if applicable)
- Replace PCM or ECM

The P0325 DTC is a very common problem with Nissan vehicles. On most Nissan vehicles the knock sensor is located on top of the engine block.

A snatching shift indicates low fluid. Put the car in park and with the engine running check the level on the transmission dip stick. If low you can top it up by adding extra fluid via the dip stick tube: add about a pint at a time and check the level between top ups. The knock sensor might have been triggered by heavy shifts so I would reset the error code and run the car with a full transmission and see if the code comes back. If the knock sensor if triggered the ECM on most modern cars may put the transmission into a limp home 'safe' mode. With luck in 1997 such things were yet to be enacted. If so just make sure the timing and all functions are OK on the engine.

If the Knock sensor wire is located near the Ignition coil wiring the electro magnetic interference from the Ignition coil can rub off on the knock sensor wire causing the brain to think the knock sensor is sending a code.

You can place a millivolt meter across a knock sensor and tap it with a screwdriver and read voltage. If it doesn't read a voltage the sensor is bad. Its job is to generate a voltage.

Also, Using a timing light the distributor must be set to spec, if not this will trigger the knock sensor. Another trigger could be a bad temperature coolent sensor screwing with the fuel and timing, causing a knock. Some bad coolent temp sensors do not display a code when they're at fault, some simply slip under the radar. Usually when the temp sensor is bad the engine will not idle properly, or hesitates in most cases. The knock senser must have a good ground to the head or block, Do not use any thread tap or compound that would prevent a ground of the sensor.

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...

IF YOU REPLACE SENSORS YOU HAVE TO ERASE PCM CODE TO TURN OFF CHECK ENGINE LIGHT.IF YOU DONT IT WILL KEEP LIGHTING UP.

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...