OBD-II Generic Error Code P0189: How to Fix Fuel Temperature Sensor B Intermittent

Q: Can I drive with error code P0189?

Yes, but you may experience reduced fuel economy, rough idle, or hard starting. It's safe for short trips, but get it diagnosed soon to avoid further issues.

Q: What causes P0189?

Common causes include a faulty fuel temperature sensor, damaged wiring or connectors, or intermittent electrical interference.

Q: How much does it cost to fix P0189?

DIY cost is $20-$60 for a replacement sensor. Professional repair may cost $100-$300 including diagnosis and labor.

Q: Is fuel temp sensor B different from sensor A?

Yes. Some vehicles have two sensors: A (primary) and B (secondary). P0189 refers specifically to sensor B. Check your vehicle's service manual for location.

Q: Will clearing the code fix P0189?

Clearing the code may temporarily turn off the check engine light, but if the underlying issue isn't resolved, the code will return.

Abstract

Error code P0189 means your vehicle's engine control module (ECM) has detected an intermittent signal from the fuel temperature sensor B. This can cause poor fuel economy, rough idling, or difficulty starting, but it's usually not an immediate breakdown risk.