OBD-II code · Powertrain (generic)
P0D04 Control Pilot Charging Ventilation Switch Intermittent/Erratic
The control pilot charging ventilation switch reports a intermittent/erratic condition. The on-board charger negotiates voltage, current and safety with the EVSE; a fault interrupts charging or limits it to AC slow-charge despite a DC fast charger being attached.
Is it safe to drive with P0D04?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyConnector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Pilot Ventilation Switch, Wiring Harness, Bms
Related codes
- P0D01Control Pilot Charging Ventilation Switch Range/Performance
- P0D02Hybrid/EV Charging System Voltage Out Of Range
- P0D03Control Pilot Charging Ventilation Switch Circuit High
- P0D05Control Pilot Charging Ventilation Switch Stuck Off
- P0D06Control Pilot Charging Ventilation Switch Stuck On
- P0D07Battery Charging System Positive Contactor A Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.