P2337 Fault Code

Cylinder 2 Above Knock Threshold

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

The P2337 fault code indicates that the Engine Control Module (ECM) has detected that the signal from the knock sensor for cylinder 2 is above the specified threshold. This can lead to excessive engine knock, potentially causing engine damage if not addressed. The knock sensor's role is to monitor vibrations in the engine and provide feedback to the ECM to adjust the ignition timing accordingly.

What are the symptoms of the P2337 code?

• Check Engine Light is illuminated
• Reduced engine performance or power loss
• Unusual engine noises, such as knocking or pinging sounds
• Engine may run rough or hesitate during acceleration

What causes the P2337 code?

• Faulty knock sensor for cylinder 2
• Wiring issues related to the knock sensor
• Engine misfires due to a different issue
• ECM software or programming error
• Mechanical issues in cylinder 2, such as improper combustion or carbon buildup

How to fix P2337?

• Inspect and replace the knock sensor for cylinder 2 if it is faulty.
• Check and repair any wiring issues or poor connections related to the knock sensor.
• Perform a tune-up, including spark plug and ignition coil inspection to ensure engine is running smoothly.
• Clear the fault code and test drive the vehicle to see if the code reappears.
• If the issue persists, consider reprogramming the ECM or further diagnosing potential engine issues.