OBD-II code · Powertrain (generic, extended)
P2B7B EVAP System Pressure Sensor/Switch C Circuit Range/Performance
The EVAP pressure sensor/switch C reports a circuit range/performance condition. Tank pressure plausibility for leak detection on this branch is impaired.
Is it safe to drive with P2B7B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor zero drifted
- PossibleSensor port restricted
- Less likelySensor element aged beyond calibration window
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
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
- Evap Pressure Sensor C, Wiring Harness, Ecm
Related codes
- P2B78Coolant Heater B Control Circuit High
- P2B79Coolant Heater B Control Circuit Performance
- P2B7AEVAP System Pressure Sensor/Switch C Circuit
- P2B7CEVAP System Pressure Sensor/Switch C Circuit Low
- P2B7DEVAP System Pressure Sensor/Switch C Circuit High
- P2B7EEVAP System Pressure Sensor/Switch C Circuit Intermittent
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.