Damaged, corroded or loose terminals at the charge port or charge control module connector; Open circuit, chafed or broken wiring in the control pilot or ventilation switch circuit; Faulty ventilation switch or the sensing element in the charge inlet assembly; Water ingress or contamination in the charge inlet or its connector; Faulty charge control module or on-board charger; Outdated or faulty control unit software where the manufacturer has issued a known correction.

P0D00

Control Pilot Charging Ventilation Switch Circuit/Open.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
D: AreaReserved
00: FaultThe specific fault in that area

What it means

P0D00 is a generic powertrain code for a fault in the control pilot charging ventilation switch circuit, reported as an open circuit. It applies to plug-in hybrid and electric vehicles. The charge control unit expected a valid signal or switch state in this circuit during charging and instead saw an open circuit. The exact layout of the circuit and how it is used differs by model, so check the manufacturer's wiring information for the vehicle.

Symptoms

Mains charging will not start, stops early or is refused
Charging warning or plug-in system fault message in the dash
Malfunction indicator lamp or hybrid system warning on
Charge port light or charging indicator shows a fault or behaves oddly
Charging works with some charge points but not others
Intermittent charging that depends on cable or connector movement

Possible causes

Damaged, corroded or loose terminals at the charge port or charge control module connectorlikely
Open circuit, chafed or broken wiring in the control pilot or ventilation switch circuitlikely
Faulty ventilation switch or the sensing element in the charge inlet assemblypossible
Water ingress or contamination in the charge inlet or its connectorpossible
Faulty charge control module or on-board chargerrare
Outdated or faulty control unit software where the manufacturer has issued a known correctionrare

How to diagnose

Read all stored codes and freeze frame data, noting whether the code is current or intermittent and any other charging or high-voltage codes
Ask about the charging conditions when the fault occurred, such as the charge point type, cable used and weather
Inspect the charge port, pins and seals for damage, moisture, corrosion or debris, and try a different known-good charging cable
Inspect the wiring and connectors between the charge inlet and the charge control module for chafing, pushed-back pins and water ingress
Check the manufacturer's wiring diagram for this model, then test the circuit for continuity, short to ground and short to supply with the connectors disconnected
Check the switch or sensor in the charge inlet against the specification for the vehicle, if it is serviceable
Check for applicable software updates or technical bulletins for the vehicle before condemning any module
Clear the code, retest charging and confirm the fault does not return

How to fix

Clean, repair or replace corroded or damaged terminals and connectors in the circuit
Repair or replace open or damaged wiring in the control pilot or ventilation switch circuit
Replace the charge inlet assembly or ventilation switch if testing shows it is faulty
Dry out and seal the charge inlet area and replace any damaged seals
Replace the charge control module or on-board charger only after the wiring and inlet are proven good
Apply a manufacturer-approved software update if the fault is a known issue for that model

Can I keep driving?

Medium severity

The car can usually still be driven, but mains charging may be blocked, so range may be limited. Have it checked soon, and follow any high-voltage or charging system warning shown on the dash.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.