BMW Error Code P1397: How to Fix It

Q: Can I drive my BMW with error code P1397?

You should avoid driving with P1397 as it can cause poor engine performance, reduced fuel economy, and potential engine damage. The engine may run rough or stall unexpectedly, creating safety risks.

Q: How much does it cost to fix BMW P1397 error code?

DIY repair typically costs $50-150 for a new camshaft position sensor. Professional repair ranges from $200-500 depending on labor rates and whether additional wiring work is needed.

Q: What causes BMW P1397 error code?

Common causes include a faulty camshaft position sensor, damaged wiring harness, corroded electrical connections, or rarely, ECU issues. The sensor can fail due to age, heat exposure, or oil contamination.

Q: Will P1397 cause my BMW to fail emissions testing?

Yes, P1397 will likely cause your BMW to fail emissions testing as it affects engine timing and performance. The error code must be resolved and the system must complete its readiness monitors before passing.

Q: How do I prevent BMW P1397 error from recurring?

Regular maintenance including timely oil changes helps prevent sensor contamination. Inspect engine bay wiring during routine service and address any oil leaks promptly as they can damage electrical components.

Abstract

BMW error code P1397 indicates a malfunction in the camshaft position (CMP) sensor circuit for bank 2. This sensor monitors the position and timing of your camshaft, which is critical for proper engine operation. When this circuit fails, you may experience rough idling, poor performance, or difficulty starting.