Damaged, chafed or water-affected wiring to the charge inlet indicator, shorted to earth; Corroded or loose connector at the charge inlet or charger control module; Faulty indicator LED or charge inlet assembly with an internal short; Faulty output driver inside the on-board charger or charge control module; Low or unstable supply or earth to the charge control module; Outdated or faulty control module software, where the manufacturer has issued a correction.

P0D8D

Battery Charger Coupler Status Indicator Control Circuit C Low.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
D: AreaReserved
8D: FaultThe specific fault in that area

What it means

P0D8D means the control unit that manages charging on a plug-in hybrid or electric vehicle has detected a low voltage or low signal on the control circuit for a charge coupler status indicator, labelled circuit C. This is the light or LED at the charge inlet that shows charging status. The module commanded the indicator and saw a voltage lower than expected, which suggests a short to earth, a wiring fault or a fault in the indicator driver. Which indicator circuit C refers to depends on the model, so check manufacturer data.

Symptoms

Charge port status light stays off, or does not show the expected colour or pattern
Charge port light behaves erratically when the cable is plugged in
Warning light or message about the charging system
Charging may still work normally, or may be interrupted or refused on some models
Fault stored with no other obvious effect on driving

Possible causes

Damaged, chafed or water-affected wiring to the charge inlet indicator, shorted to earthlikely
Corroded or loose connector at the charge inlet or charger control modulelikely
Faulty indicator LED or charge inlet assembly with an internal shortpossible
Faulty output driver inside the on-board charger or charge control modulepossible
Low or unstable supply or earth to the charge control modulepossible
Outdated or faulty control module software, where the manufacturer has issued a correctionrare

How to diagnose

Read all stored codes and freeze frame data, noting whether the fault is current or intermittent and whether other charging or high-voltage codes are present
Check for manufacturer service bulletins and software updates relevant to the model and charging system
Inspect the charge inlet for water, dirt, corrosion, heat damage or physical damage, and check the indicator operation with the cable plugged in and unplugged
Inspect the wiring and connectors between the charge inlet and the charge control module for chafing, pin damage, green corrosion or moisture
Check the 12 V battery condition and the supply and earth to the charge control module
With the ignition off and the connector disconnected, test the indicator circuit for a short to earth using the wiring diagram for that model
Use the scan tool's actuator test, if available, to command the indicator and watch the circuit voltage
Clear the code and retest by cycling the ignition and plugging in a charge cable to see if the fault returns

How to fix

Repair or replace damaged wiring that is shorted to earth, following the manufacturer's wiring repair procedure
Clean, repair or replace corroded or damaged connectors and terminals, and seal against moisture
Replace the charge inlet assembly or indicator if it has an internal fault
Replace or repair the charge control module or on-board charger if the output driver has failed, and code it as required
Correct the 12 V supply or earth problem, including battery or charging faults
Apply a manufacturer-issued software update if one covers this fault

Can I keep driving?

Low severity

The car can normally be driven as usual, as this is mainly an indicator circuit fault, but book it in soon. If charging is refused, or you see high-voltage or charging warnings, have it checked promptly, and do not open or work on high-voltage components unless trained.

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