P2B7CEVAP System Pressure Sensor/Switch C Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2B7C reports that the signal of EVAP pressure sensor C stays below its valid voltage window. The only public manufacturer reference is VW: on the 2025–2026 Jetta (engine DNKA) and Taos FWD (DYBA) the code points to fuel tank pressure sensor G400 with its NVLD switch, and bulletin 01-26-01 replaces the sensor assembly with the revised plug housing (part 5WA201700B) if the old version is fitted. No threshold is published for sensor C; Mitsubishi's comparable check on its own tank pressure sensor (P24D7) trips below 1.0 V for 2 s. A missing 5 V reference, a signal wire shorted to ground or a dead sensor are typical. Whether low means vacuum or pressure depends on the sensor's characteristic curve.
- What you may notice
- Check engine light on
- EVAP leak tests not carried out, readiness incomplete
- Other sensors on the same 5 V supply may report faults too
- Likely causes
- Likely5 V reference to the sensor missing or shorted
- PossibleSignal wire shorted to ground
- 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.