Description of the P0332 fault code.
OBD2 Error Codes

P0332 Knock Sensor Circuit Low (Sensor 2, Bank 2)

26.05.2022 /

P0332 – OBD-II Trouble Code Technical Description

Trouble code P0332 indicates that the PCM (automatic transmission control module) has detected the knock sensor 2 (bank 2) circuit voltage is too low.

What does the fault code mean P0332?

Trouble code P0332 indicates a problem with the knock sensor, which has detected that the signal voltage in the knock sensor circuit is too low. This code usually indicates a faulty or inappropriate knock sensor. The knock sensor, also known as the knock sensor, is responsible for detecting knock in the engine and transmitting this information to the engine control module (ECM). If the ECM detects that the knock sensor signal is below the permissible voltage level, it generates error code P0332.

Fault code P0332.

Possible reasons

Some possible reasons for the P0332 trouble code:

  • Defective or damaged knock sensor: The knock sensor itself may be damaged or faulty due to wear, corrosion, or other reasons.
  • Wiring and Connections: The wiring or connectors connecting the knock sensor to the engine control module (ECM) may be damaged, broken, or oxidized, resulting in poor contact and low signal voltage.
  • Improper Installation: Improper installation of the knock sensor can result in incorrect contact or signal failure, causing P0332.
  • Engine Control Module (ECM) Problems: A problem with the ECM itself can cause the knock sensor to not read the signal correctly and cause an error.
  • Electrical Problems: Problems with the vehicle's electrical system, such as a short circuit, broken wiring, or insufficient voltage, can also cause the P0332 code.
  • Other Problems: Certain other problems with the engine or engine components can also affect the performance of the knock sensor and cause this error to appear.

To accurately diagnose and fix the problem, it is recommended that you contact an experienced mechanic or auto repair shop who can conduct a detailed check and determine the specific cause of the P0332 error code on your car.

What are the symptoms of a fault code? P0332?

Symptoms for DTC P0332 may include the following:

  • Rough Engine Running: The most common symptom is a rough running or floating engine idle due to an incorrect signal from the knock sensor.
  • Loss of Power: The engine may experience a loss of power due to an incorrect knock sensor signal, which can result in reduced vehicle performance and acceleration.
  • Increased fuel consumption: Improper operation of the knock sensor can result in inefficient fuel combustion, which in turn can lead to increased fuel consumption.
  • Jerking or Jerking When Accelerating: Jerking or jerking may occur when accelerating due to an incorrect knock sensor signal.
  • Check Engine Ignition: When the Check Engine light appears on your dashboard, it indicates a problem, including trouble code P0332.
  • Poor Idle Performance: The engine may idle rough or run rough due to a problem with the knock sensor.
  • Engine Whirling or Knocking: A faulty knock sensor can cause unwanted sounds such as engine clunking or knocking.

It's important to note that symptoms can vary depending on the make and model of your vehicle, as well as the specific cause of the problem. If you notice one or more of these symptoms, it is recommended that you contact a qualified mechanic or auto repair shop to diagnose and repair the problem.

How to diagnose a fault code P0332?

To diagnose DTC P0332, follow these steps:

  1. DTC Scan: Using a diagnostic scan tool, read DTCs from the Engine Control Module (ECM) and verify that P0332 is present.
  2. Inspect Wiring and Connections: Check the wiring and connectors connecting the knock sensor to the ECM for damage, corrosion, or breaks. Make sure all connections are tight and secure.
  3. Knock Sensor Test: Test the knock sensor using a multimeter or specialized tester. Verify that the sensor is functioning correctly and is producing the correct signal according to the manufacturer's specifications.
  4. Check Resistance: Check the resistance of the knock sensor using a multimeter and compare it to the recommended values ​​found in your vehicle's service manual.
  5. Checking the Engine Control Module (ECM): If necessary, check the operation of the ECM to ensure that it is receiving the correct signals from the knock sensor and processing them correctly.
  6. Additional Tests: Perform additional tests as recommended by the manufacturer to rule out other possible causes of the P0332 code, such as problems with the ignition system or fuel delivery system.

After diagnosing and identifying the cause of the P0332 error, you can begin to repair or replace the faulty components.

Diagnostic errors

When diagnosing DTC P0332, the following errors may occur:

  • Faulty wiring: Faulty wiring or connectors may not always be apparent upon initial inspection. This may lead to missing defects or misinterpreting the problem.
  • Faulty knock sensor: Sometimes the knock sensor can be faulty, but this is not always obvious upon initial inspection. Incorrect interpretation of signals or incorrect testing can lead to an incorrect conclusion about the condition of the sensor.
  • ECM Malfunction: During diagnosis, the engine control module (ECM) may malfunction, causing data from the knock sensor or other system components to be incorrectly interpreted.
  • Insufficient Diagnosis: Some mechanics may not perform all necessary tests or skip some diagnostic steps, which could result in missing the cause of the P0332 code or making an incorrect repair.
  • Misinterpretation of data: Interpretation of data from a knock sensor can be difficult, and misunderstanding of test results can lead to incorrect conclusions about the condition of the system.

To avoid these errors, it is important to carry out a comprehensive and thorough diagnosis using the correct equipment and methods. If there are doubts or uncertainty about the diagnosis, it is better to contact an experienced specialist or car service center for further research and repair.

How serious is the fault code? P0332?

Trouble code P0332 indicates a problem with the knock sensor in the vehicle's engine. This problem can affect engine performance and efficiency. Depending on the specific cause of the error and its impact on engine performance, the severity of the problem may vary.

Some possible consequences of the P0332 code:

  • Reduced Performance: Improper operation of the knock sensor can result in reduced engine performance, which will affect acceleration and overall vehicle dynamics.
  • Increased fuel consumption: Inadequate knock sensor performance can result in inefficient fuel combustion, resulting in increased fuel consumption.
  • Engine Damage: If the problem is not corrected in time, it may result in more serious engine damage such as overheating, wear or damage to the pistons.
  • Deterioration of environmental performance: Improper combustion of fuel can lead to increased emissions of harmful substances, which will negatively affect the environmental performance of the vehicle.

Overall, while the P0332 code itself is not safety critical, its impact on engine performance and overall vehicle performance makes this a serious issue that requires immediate attention.

What repair will help eliminate the code? P0332?

Repair to resolve DTC P0332 will depend on the specific cause of the problem. Some general steps that may help resolve this error:

  1. Replacing the Knock Sensor: If the knock sensor is found to be faulty or defective, replacing it may solve the problem. When replacing a sensor, it is important to choose an original or high-quality analog spare part.
  2. Wiring Inspection and Replacement: Check the wiring and connectors connecting the knock sensor to the engine control module (ECM). If damage, corrosion or breaks are found, the associated wires and connectors must be replaced or repaired.
  3. ECM Diagnosis and Repair: If the problem is with the Engine Control Module (ECM), the ECM itself may need to be diagnosed and repaired or replaced.
  4. Checking and Repairing Other Components: Sometimes the cause of the P0332 code may be related to other components in the vehicle's ignition, fuel, or electrical system. Check and correct any other problems that might be related to the malfunction.
  5. Follow-up Diagnosis and Testing: After repair work has been completed, the system should be tested to ensure that DTC P0332 no longer appears. It is important to make sure that the problem has been completely resolved.

To successfully repair the P0332 trouble code, it is recommended that you contact an experienced mechanic or auto repair shop, especially if you are not confident in your diagnostic and repair skills. This will help avoid additional problems and ensure that your vehicle functions properly.

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P0332 – Brand-specific information


Trouble code P0332 refers to problems with the knock sensor, meaning for some car brands:

This is general information only, and each manufacturer may have slight variations in the meaning of the P0332 code. For accurate information, it is recommended that you consult the official service manual for your specific vehicle model.

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