P0D4E

What it means

P0D4E means the battery charger control circuitry saw the output voltage sensor signal for the hybrid or electric vehicle battery charger fall below the expected range. The control unit compares the sensed charger output voltage with the expected value and battery voltage. A very low or implausible reading suggests a circuit fault, a sensor fault or a genuine low output. The exact sensor location and test values depend on the model.

Symptoms

• Hybrid or EV system warning light on the dashboard
• Plug-in charging will not start, stops early or is slower than normal
• Charge port or charging indicator shows a fault
• Reduced EV range or reduced hybrid battery support
• Message on the dash saying the charging system needs service

Possible causes

• Wiring fault in the charger output voltage sensor circuit, such as a short to ground, chafing or a broken wirelikely
• Corroded, damaged or loose connector at the charger or its control modulelikely
• Faulty charger output voltage sensor or internal sensing circuit in the charger unitpossible
• Low 12 V supply voltage or poor earth to the charger control module causing a false low readingpossible
• Water ingress or contamination inside the charger or its wiringpossible
• Genuinely low charger output or low high-voltage battery voltage caused by a battery or charger faultrare

How to diagnose

1. Read all stored and pending codes and record the freeze frame data, noting charging state and 12 V voltage when the fault set.
2. Check the 12 V battery condition and charging, as low supply voltage can upset the charger control module.
3. Look for related codes for the high-voltage battery, charger, charge port or communication faults and deal with those first.
4. Check the live data for charger output voltage and compare it with the high-voltage battery voltage reading, noting whether the sensor value is stuck low or implausible.
5. Have a suitably trained person isolate the high-voltage system following the manufacturer procedure, then visually inspect the charger wiring and connectors for damage, corrosion, moisture or pin tension problems.
6. Using the wiring diagram, test the sensor circuit for continuity, short to ground and reference voltage, and check the earth connections.
7. Inspect the charger housing and mounting area for water ingress, impact damage or coolant leaks, as applicable to the model.
8. If wiring and supply are good, check manufacturer data for charger test procedures before condemning the unit.

How to fix

• Repair or replace damaged wiring in the sensor circuit, using the correct high-voltage-rated repair methods where applicable.
• Clean, repair or replace corroded or damaged connectors and terminals.
• Replace the battery charger unit or its sensor if testing confirms an internal fault.
• Restore a healthy 12 V supply by charging or replacing the 12 V battery and repairing poor earths.
• Dry out and repair any water ingress source, and replace affected components.
• Diagnose and repair any high-voltage battery fault that is causing a genuinely low voltage.

Can I keep driving?

Nearby codes

• P0D4DGenericBattery Charger Hybrid/EV Battery Output Voltage Sensor Circuit Range/Performance
• P0D4FGenericBattery Charger Hybrid/EV Battery Output Voltage Sensor Circuit High