Powertrain, generic (extended)

P2B7D EVAP System Pressure Sensor/Switch C Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Sensor ground wire open or high resistance
Signal wire shorted to 5 V reference or battery voltage
Early-version sensor assembly (VW Jetta/Taos)
Pressure sensor C failed internally

Symptoms

  • Check engine light on
  • EVAP readiness not set after clearing codes
  • Car usually drives normally

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

P2B7AP2B7CP24D8P0453

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