OBD-II code · Powertrain (generic)
P0185 Fuel Temperature Sensor B Circuit Malfunction
The ECU detects an electrical fault in the fuel temperature sensor B circuit (second sensor used on systems with separate supply/return temperature monitoring or twin-tank arrangements).
Is it safe to drive with P0185?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
- PossibleWiring or connector fault
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 Wiring
Related codes
- P0180Fuel Temperature Sensor A Circuit Malfunction
- P0182Fuel Temperature Sensor A Circuit Low Input
- P0183Fuel Temperature Sensor A Circuit High Input
- 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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.