OBD-II code · Powertrain (generic)
P00B1 Radiator Coolant Temperature Sensor Circuit
Generic electrical fault at the radiator coolant temperature sensor (downstream of radiator, used for thermostat diagnosis).
Is it safe to drive with P00B1?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Radiator Coolant Temp Sensor, Sensor Wiring
Related codes
- P00AEIntake Air Temperature Sensor 1 Circuit Intermittent Bank 2
- P00AFTurbocharger/Supercharger Boost Control A Module Performance
- P00B0Turbocharger/Supercharger Boost Control B Module Performance
- P00B2Radiator Coolant Temperature Sensor Circuit Range/Performance
- P00B3Radiator Coolant Temperature Sensor Circuit Low
- P00B4Radiator Coolant Temperature Sensor Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.