OBD-II code · Powertrain (generic)
P0189 Fuel Temperature Sensor B Circuit Intermittent
The ECU detects intermittent dropouts on the fuel temperature sensor B circuit. Loose connector, chafed wiring or sensor failing under thermal load.
Is it safe to drive with P0189?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyConnector loose or corroded
- PossibleWiring chafed
- Less likelyConnector with intermittent contact under vibration
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Temperature Sensor B, Sensor Connector
Related codes
- P0184Fuel Temperature Sensor A Circuit Intermittent
- P0186Fuel Temperature Sensor B Circuit Range / Performance
- P0187Fuel Temperature Sensor B Circuit Low Input
- P0188Fuel Temperature Sensor B Circuit High Input
- P018AFuel Pressure Sensor B Circuit
- P018BFuel Pressure Sensor B Circuit Range/Performance
- P018CFuel Pressure Sensor B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.