Powertrain, generic · Hybrid propulsion

P0D05 Control Pilot Charging Ventilation Switch Stuck Off

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Stuck Off for the ventilation switch means the module commands the switch closed, yet the pilot does not drop to the level around 3 V that marks a request for charging with ventilation. Possible causes are a switch that no longer closes, an open resistor in the roughly 270 Ω branch, or a measuring fault in the module. Because ordinary charging takes place without a ventilation request, this fault rarely restricts charging; it mainly shows up during the self-test the module runs on the circuit. No manufacturer documents this code publicly; GM's Chevrolet Volt performs that kind of self-test as P0D01, with a normalized pilot voltage window of 0.04-0.10, and CARB requires plug-in vehicles to monitor the charging system. The opposite case is P0D06, circuit faults are P0D00 to P0D03. Expect a stored code and charging that still works.

Likely causes

Ventilation switch in the module no longer closing
Open resistor or solder joint in the ventilation branch
Pilot measuring fault in the charging module

Symptoms

  • Stored code, charging normally still possible
  • Charging system warning in the cluster on some vehicles

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

P0D00P0D01P0D02P0D03P0D06

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