OBD-II code · Powertrain (generic, extended)
P2B8F Turbocharger/Supercharger B Temperature Sensor Circuit
The ECM detects a circuit fault on the turbocharger/supercharger b temperature sensor. Reading cannot be used reliably for control.
Is it safe to drive with P2B8F?
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
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
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
- Turbocharger B Temperature Sensor, Wiring Harness, Ecm
Related codes
- P2B6ETurbocharger/Supercharger A Temperature Sensor Circuit
- P2B8CIntake Air O2 Sensor Heater Control Circuit Range/Performance Bank 1
- P2B8DIntake Air O2 Sensor Heater Control Circuit Low Bank 1
- P2B8EIntake Air O2 Sensor Heater Control Circuit High Bank 1
- P2B90Turbocharger/Supercharger B Temperature Sensor Circuit Low
- P2B91Turbocharger/Supercharger B Temperature Sensor Circuit High
- P2B92Turbocharger/Supercharger B Temperature Sensor Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.