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What does Error Code P0332 mean?

Moderate Issue
DTC Code P0332 indicates a Knock Sensor Circuit Low Voltage issue in Bank 2. This code is triggered when the Engine Control Module (ECM) detects a low voltage signal from the knock sensor, which is responsible for monitoring engine vibrations to prevent detonation.

What are the symptoms of Error Code P0332?

  • Engine Light ON: The check engine light or service engine soon warning light illuminates, indicating a potential issue with the knock sensor circuit on Bank 2.
  • Engine Lack / Loss of Power: The vehicle may experience a noticeable reduction in power output, which can be linked to the knock sensor circuit's inability to properly detect engine knock, potentially affecting engine performance.

What causes Error Code P0332?

  • The knock sensor on Bank 2 may be malfunctioning, leading to incorrect voltage readings.
  • Poor electrical connections in the knock sensor circuit can cause low voltage signals.
  • An open or shorted harness in the knock sensor circuit can disrupt proper signal transmission.
  • The Engine Control Module (ECM) might be faulty, affecting the sensor's voltage readings.
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How to fix Error Code P0332?

  • Verify DTC Code: Confirm the presence of DTC P0332 using an OBD-II scanner. Ensure no other related codes are present that might affect diagnosis.
  • Inspect Knock Sensor Wiring: Check the wiring and connectors for the knock sensor on Bank 2. Look for signs of damage, corrosion, or disconnection.
  • Test Knock Sensor Voltage: Using a multimeter, measure the voltage at the knock sensor connector. Compare the readings with manufacturer specifications to confirm low voltage.
  • Check ECM/PCM: Inspect the Engine Control Module (ECM) or Powertrain Control Module (PCM) for any faults or issues that might affect the knock sensor circuit.
  • Replace Knock Sensor: If all other components are functioning correctly, replace the knock sensor on Bank 2. Ensure the new sensor is properly installed and connected.
  • Clear DTC and Test Drive: Clear the DTC code using the OBD-II scanner. Conduct a test drive to ensure the issue is resolved and the code does not reappear.
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