OBD-II code · Powertrain (generic, extended)
P2B7C EVAP System Pressure Sensor/Switch C Circuit Low
The EVAP pressure sensor/switch C reports a circuit low condition. Tank pressure plausibility for leak detection on this branch is impaired.
Is it safe to drive with P2B7C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
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
- P2B79Coolant Heater B Control Circuit Performance
- P2B7AEVAP System Pressure Sensor/Switch C Circuit
- P2B7BEVAP System Pressure Sensor/Switch C Circuit Range/Performance
- P2B7DEVAP System Pressure Sensor/Switch C Circuit High
- P2B7EEVAP System Pressure Sensor/Switch C Circuit Intermittent
- P2B7FTurbocharger/Supercharger Boost Control Module A Calibration Not Learned/Programmed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.