OBD-II Generic Error Code P0389: How to Fix It

Q: Can I drive with code P0389?

It's not recommended. The car may stall, hesitate, or fail to start, especially when the sensor signal is intermittent. Driving could leave you stranded.

Q: Is P0389 the same as P0385?

No. P0385 is for crankshaft position sensor 'A' circuit malfunction. P0389 is for sensor 'B' intermittent signal. Check your vehicle's wiring diagram to identify which sensor is 'B'.

Q: Will cleaning the sensor fix P0389?

Possibly, if the issue is due to debris on the sensor tip or corroded connector. However, if the sensor is internally faulty, cleaning won't help.

Q: How much does it cost to fix P0389?

If DIY, a replacement sensor costs $20–$100. If a mechanic does it, labor adds $100–$200. Reluctor ring replacement is more expensive ($500+) due to labor.

Q: Can a bad battery cause P0389?

Yes, low battery voltage can cause intermittent sensor signals. Test your battery and charging system if other electrical issues exist.

Abstract

Error code P0389 indicates that your vehicle's Engine Control Module (ECM) has detected an intermittent signal from the crankshaft position sensor 'B'. This can cause poor engine performance, stalling, or difficulty starting. Follow this guide to troubleshoot and fix the issue.