P0D18
Battery Charging System A High Voltage Interlock Circuit High
P0D18 is an OBD-II diagnostic trouble code meaning: Battery Charging System A High Voltage Interlock Circuit High. Common causes: high voltage relay malfunction, damage to the wiring in the interlock circuit. Estimated repair cost: $56–278.
Symptoms
- Warning light on dashboard
- Problems with charging a high-voltage battery
- Reduced performance of the hybrid system
- The car may go into emergency mode
- Possible problems starting the engine
Causes
- High voltage relay malfunction
- Damage to the wiring in the interlock circuit
- Problems with the charging system control unit
- High voltage battery fault
- Short circuit in high voltage circuit
How to Fix
- Check the condition of the high voltage relay
- Inspect the wiring for damage
- Check connections in the interlock circuit
- Test the charging system control unit
- Check the condition of the high-voltage battery
- Repair only from an authorized dealer
Related codes
Error P0D18 by Vehicle Brand
FAQ
What does the P0D18 code mean?
P0D18 is an OBD-II diagnostic trouble code that indicates: Battery Charging System A High Voltage Interlock Circuit High
What causes a P0D18 error code?
The most common causes of P0D18 include: High voltage relay malfunction; Damage to the wiring in the interlock circuit; Problems with the charging system control unit; High voltage battery fault.
How do I fix a P0D18 diagnostic trouble code?
To fix P0D18: Check the condition of the high voltage relay. Inspect the wiring for damage. Check connections in the interlock circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0D18?
Do not drive — repair immediately
How much does it cost to fix P0D18?
The estimated repair cost for P0D18 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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