P0331 Knock Sensor Performance Bank 2

OBD-II Code P0331: The OBD-II code P0331 indicates a problem with the knock sensor circuit in bank 2 of the engine. This code is triggered when the Engine Control Module (ECM) detects that the knock sensor’s signal voltage is not within the expected range.

Description: The knock sensor monitors vibrations caused by detonation or “knocking” in the engine. When it detects knocking, it sends a signal to the ECM to adjust ignition timing and prevent damage. If the ECM receives an abnormal signal from the knock sensor on bank 2, it sets this code.

p0331 – Knock Sensor 2 Circuit Range/Performance (Bank 2) – Moderate

Common Causes

p0331 – Knock Sensor 2 Circuit Range/Performance (Bank 2)

Common causes:

• Faulty knock sensor
• Wiring issues such as frayed or corroded wires
• Poor electrical connection at the knock sensor
• Engine mechanical problems, such as excessive carbon buildup or engine knocking
• Incorrect fuel octane rating causing pre-ignition

 

Common Misdiagnosis

OBD2 Code: P0331

Description: Knock Sensor 2 Circuit Range/Performance (Bank 2)

Common Misdiagnosis: Replacing the knock sensor without checking for engine mechanical issues or verifying the wiring and connections.

 

Common Diagnostic Steps

OBD2 Code: P0331

Description: Knock Sensor 2 Circuit Range/Performance (Bank 2)

• Check for any additional trouble codes that may indicate a related issue.
• Inspect the knock sensor wiring and connectors for damage or corrosion.
• Test the knock sensor using a multimeter to ensure it is functioning correctly.
• Examine the engine control module (ECM) for any software updates or known issues.
• Verify proper engine timing and check for any mechanical issues such as excessive carbon buildup or incorrect fuel octane rating.
• If necessary, replace the knock sensor on bank 2 with an OEM part to ensure compatibility and performance.