P0332: Knock Sensor 2 Circuit Low Input (Bank 2)

What does the P0332 error code mean?

The P0332 diagnostic trouble code stands for "Knock Sensor 2 Circuit Low Input (Bank 2)." This code is triggered when the engine control module detects a lower-than-expected voltage signal from the knock sensor on Bank 2. The knock sensor monitors engine vibrations to detect knocking or pre-ignition, which can damage the engine.

Why it's important to address the P0332 code

The knock sensor plays a crucial role in protecting the engine from damage caused by abnormal combustion, such as detonation. If the sensor fails or provides inaccurate readings, the engine control module may be unable to adjust ignition timing appropriately, leading to potential engine damage, reduced performance and increased emissions.

Can I safely drive my car with this error code?

Driving with the P0332 code is possible but not advisable. While the car may still operate, the engine control module may revert to less efficient ignition settings, reducing performance and fuel efficiency. Prolonged driving without addressing the issue can increase the risk of engine damage if knocking occurs. It is best to diagnose and repair the issue promptly.

Common symptoms associated with the P0332 error code

• Illuminated check engine light

• Reduced engine performance

• Increased fuel consumption

• Engine knocking or pinging noises

• Poor acceleration

• Possible increase in emissions

How to diagnose the P0332 error code 

Diagnosing the P0332 code involves these steps:

• Scan for codes: Use an OBD-II scanner to confirm the P0332 code and check for related codes.

• Inspect the knock sensor: Check for physical damage, corrosion, or improper installation of the knock sensor.

• Test the sensor circuit: Use a multimeter to measure the voltage and continuity in the knock sensor circuit.

• Inspect wiring and connectors: Look for damaged, corroded or loose wiring and connectors associated with the sensor.

• Verify engine control module function: Test the engine control module to ensure it is processing signals correctly from the knock sensor.

How to repair the P0332 error code 

Common repairs include:

• Replacing a faulty knock sensor on Bank 2.

• Repairing or replacing damaged wiring or connectors in the knock sensor circuit.

• Ensuring proper installation and torque of the knock sensor.

• Addressing underlying engine issues, such as carbon buildup or incorrect ignition timing, that may cause knocking.

• Clearing the code and performing a test drive to confirm the issue is resolved.

Curious about other error codes?

Visit our OBD-II Diagnostic Trouble Codes page to learn more.