P0D50
Battery Charger Hybrid/EV Battery Output Voltage Sensor Circuit Intermittent/Erratic.
- Generic
- Powertrain
- Generic code
- Medium severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- D
- AreaReserved
- 50
- FaultThe specific fault in that area
What it means
P0D50 is a generic powertrain code meaning the control unit monitoring the on-board battery charger has seen an intermittent or erratic signal from the charger's hybrid/EV battery output voltage sensor circuit. The reading jumps, drops out or does not follow the expected pattern, so the charger cannot trust the voltage it is delivering to the high-voltage battery. The exact sensor location and monitoring strategy vary by model and system design.
Symptoms
- Warning light on the dashboard, such as the hybrid/EV system or malfunction indicator
- Charging stops part-way, fails to start or is slower than normal
- Charge level or charging status display behaves erratically
- Reduced electric range because the battery is not fully charged
- Charging works on some occasions but not others
- Vehicle may enter a limited performance mode
Possible causes
- Loose, corroded or damaged connector at the charger output voltage sensor circuitlikely
- Chafed, broken or intermittently open/shorted wiring between the sensor and the charger control unitlikely
- Faulty charger output voltage sensor or internal sensing circuitpossible
- Poor connection or fault in the low-voltage supply or earth to the charger control unitpossible
- Electrical interference or a fault in the high-voltage battery connection affecting the sensor signalpossible
- Fault within the charger control unit or outdated softwarerare
How to diagnose
- Read all stored and pending codes and record the freeze frame data, noting any related charger, battery or communication codes
- Check the low-voltage battery condition and the charger's power and earth supplies, as low voltage can cause erratic readings
- Visually inspect the charger wiring and connectors for damage, water ingress, corrosion, heat marks or bent pins, following the manufacturer's high-voltage safety procedure
- Check the charging inlet, charging cable and supply for faults by trying a different known-good supply
- With the car charging, watch live data for the output voltage reading and look for spikes, dropouts or readings that disagree with the battery's reported voltage
- Wiggle-test the harness and connectors while monitoring live data to see if the signal becomes erratic
- Check the circuit's resistance and continuity using the manufacturer's wiring information, with the high-voltage system isolated by a trained person
- Check for applicable service bulletins or software updates for the charger or control unit for your model
How to fix
- Clean, repair or replace damaged or corroded connectors and terminals
- Repair or replace the faulty section of wiring
- Replace the charger output voltage sensor or the charger assembly if the sensing circuit is faulty, as the manufacturer specifies
- Correct low-voltage supply or earth faults to the charger control unit
- Update the charger or control unit software if an outdated version is a known cause for the vehicle
- Clear the codes and test charge the vehicle to confirm the fault does not return
Can I keep driving?
The car can usually still be driven, but charging may be unreliable and performance or range may be reduced. Have it checked soon, and do not keep charging it if you notice a burning smell, heat or other warning messages. Work on high-voltage components should only be done by suitably trained people.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.