P2B7DEVAP System Pressure Sensor/Switch C Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2B7D is the high counterpart to P2B7C: the signal of EVAP pressure sensor C sits above its valid range. VW lists it in bulletin 01-26-01 for the 2025–2026 Jetta and Taos FWD, whose fuel tank pressure sensor G400 came with a plug-housing orifice that proved too small; the first step is to check which housing version is installed. Public limits for sensor C do not exist; Mitsubishi's equivalent test on its own tank pressure sensor (P24D8) sets above 4.1 V for 2 s. An open sensor ground, a signal wire shorted to the 5 V reference or to battery voltage and an internal sensor fault all push the signal up. CARB 13 CCR 1968.2 requires out-of-range checks on all EVAP inputs; leak monitoring is held back until repair.
- What you may notice
- Check engine light on
- EVAP readiness not set after clearing codes
- Car usually drives normally
- Likely causes
- LikelySensor ground wire open or high resistance
- PossibleSignal wire shorted to 5 V reference or battery voltage
- PossibleEarly-version sensor assembly (VW Jetta/Taos)
- RarePressure sensor C failed internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.