P0D3D
Battery Charger A Input Voltage Sensor A Circuit.
- Generic
- Powertrain
- Generic code
- Medium severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- D
- AreaReserved
- 3D
- FaultThe specific fault in that area
What it means
P0D3D means the control unit monitoring the on-board battery charger has detected a fault in the circuit for the charger's input voltage sensor (sensor A). The reading was missing, out of range, implausible or erratic compared with what the charger expects from the external supply. The exact sensor location and the way the fault is judged vary by model, so follow the manufacturer's information for the vehicle.
Symptoms
- Plug-in charging will not start or stops part-way through
- Charging is slower than normal or intermittent
- Charging or powertrain warning light on the dash
- Message about a charging system fault or service needed
- Charge port indicator shows a fault or flashes unexpectedly
Possible causes
- Fault in the charger input voltage sensor or its internal circuit within the on-board chargerlikely
- Damaged, corroded or loose wiring or connectors between the charge inlet and the on-board chargerlikely
- Unstable or poor-quality external supply, or a faulty charging cable or charging point, giving implausible input voltage readingspossible
- Contaminated, damaged or overheated charge inlet terminalspossible
- Low 12 V battery or poor earth or supply to the charger control unitpossible
- Charger control unit fault or outdated softwarerare
How to diagnose
- Read all stored and pending codes and the freeze frame data, noting any other charger, 12 V or communication faults
- Try a different charging point and cable, and check the household supply is stable, to rule out an external supply problem
- Inspect the charge inlet and its terminals for water, dirt, burning, bent pins or damage
- Check the condition and state of charge of the 12 V battery and its terminals
- Visually inspect the charger wiring and connectors for chafing, corrosion, water ingress and loose fit, following the manufacturer's high-voltage safety procedure
- Compare the live input voltage reading with the known supply voltage while charging, if the vehicle shows it
- Check the wiring continuity, supply and earth to the charger sensor circuit using the wiring diagram, with the high-voltage system made safe by a qualified person
- Check for manufacturer software updates or technical bulletins relating to the charger
How to fix
- Repair or replace damaged wiring and clean or secure affected connectors
- Replace or repair a damaged charge inlet
- Replace the on-board charger or its control module if the sensor circuit is faulty internally
- Charge or replace a weak 12 V battery and correct any poor earths
- Update the charger or control unit software only if an outdated version is a known cause for the vehicle
- Replace a faulty charging cable, or use a supply that has been checked and repaired
Can I keep driving?
A hybrid or electric car can usually still be driven, but plug-in charging may be limited or unavailable, so range could be affected. Have it checked soon, and stop using external charging if you notice heat, burning smells or damage at the inlet.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.