Powertrain, generic · Hybrid propulsion

P0D06 Control Pilot Charging Ventilation Switch Stuck On

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Stuck On means the ventilation switch remains closed when it should be open, so the pilot is held near 3 V and the station reads a permanent demand for charging with ventilation. Stations that cannot provide ventilation do not supply power in that state, which in practice stops charging altogether. Likely causes are a welded or sticking switch, a short across the 270 Ω branch, or a module output that no longer releases. No manufacturer documents this code publicly; GM's Chevrolet Volt checks the same switch through P0D01 by the pilot level it causes in a self-test, and Mercedes-Benz documents the matching failure of charging switch A as P0CFE00 (switch not opening, cured by software). The counterpart is P0D05, circuit faults are P0D00 to P0D03. The car is detected at the station but does not charge.

Likely causes

Ventilation switch contacts welded or sticking closed
Short across the ventilation resistor branch
Module output or software holding the switch on

Symptoms

  • Charging station does not supply power
  • Charging error message after plugging in

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–1,200
Time0.5–3 h

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

Parts involved

control pilot ventilation switchwiring harnesson board charger

Related codes

P0D00P0D01P0D02P0D03P0D05P0CFE

References: law.cornell.edu, en.wikipedia.org, gsi.ext.gm.com.