OBD-II code · Powertrain (generic, extended)
P2B2B Engine Coolant Temperature Sensor 5 Circuit
The ECM detects a generic fault on the engine coolant temperature 5 sensor circuit. Reading cannot be used reliably for control.
Is it safe to drive with P2B2B?
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
Symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Engine Coolant Temperature Sensor 5, Wiring Harness, Ecm
Related codes
- P01E3Engine Coolant Temperature Sensor 3 Circuit
- P2182Engine Coolant Temperature Sensor 2 Circuit
- P2AFCEngine Coolant Temperature Sensor 4 Circuit
- P2BB6Engine Coolant Temperature Sensor 6 Circuit
- P2B28Hybrid/EV Battery Pack Coolant Pump A Performance
- P2B29Hybrid/EV Battery Pack Coolant Pump A Overspeed - Dry Run
- P2B2AHybrid/EV Electronics Coolant Pump A Overspeed - Dry Run
- P2B2CEngine Coolant Temperature Sensor 5 Range/Performance
- P2B2DEngine Coolant Temperature Sensor 5 Circuit Low
- P2B2EEngine Coolant Temperature Sensor 5 Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.