Powertrain, generic (extended)

P2B7C EVAP System Pressure Sensor/Switch C Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

5 V reference to the sensor missing or shorted
Signal wire shorted to ground
Early-version sensor assembly (VW Jetta/Taos)
Pressure sensor C failed internally

Symptoms

  • Check engine light on
  • EVAP leak tests not carried out, readiness incomplete
  • Other sensors on the same 5 V supply may report faults too

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–450
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

evap pressure sensor cwiring harnessecm

Related codes

P2B7AP2B7DP24D7P0452

References: law.cornell.edu, static.nhtsa.gov, mitsubishitechinfo.com.