P0333 Fault Code

Knock Sensor 2 Circuit High Input (Bank 2)

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0333 fault code indicates that there is a high input signal from the knock sensor circuit on Bank 2. This sensor plays a crucial role in monitoring engine knock or detonation, which can cause engine damage if not addressed. When the Engine Control Module (ECM) detects a signal that exceeds predefined thresholds, it triggers this fault code and may enter a failsafe mode to protect the engine.

What are the symptoms of the P0333 code?

• Check Engine Light illuminated
• Possible decrease in engine performance
• Unusual engine knocking sounds
• Rough idling or engine stalling
• Poor fuel economy due to inefficient engine operation

What causes the P0333 code?

• Faulty knock sensor 2
• Poor electrical connections or damaged wiring in the knock sensor circuit
• Faulty ECM or calibration issues
• Excessive engine noise that confuses the sensor reading
• Corrosion or contamination affecting the sensor's performance

How to fix P0333?

• Inspect and repair any damaged wires or connectors in the knock sensor circuit.
• Replace the faulty knock sensor if it is determined to be malfunctioning.
• Update or reprogram the ECM if necessary.
• Ensure that the engine is free from excessive noise that could affect sensor readings.
• Clear the trouble codes and test drive the vehicle to ensure the issue is resolved.