OBD-II code · Powertrain (generic)
P0D18 Battery Charging System A High Voltage Interlock CircuitCircuit High
The HV interlock circuit of battery charging system A reports a circuit high condition. Safety interlock chain may be compromised.
Is it safe to drive with P0D18?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWire shorted to B+
- PossiblePull-down resistor open
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Bcs A Hv Interlock, Wiring Harness, Bms
Related codes
- P0D15Battery Charging System A High Voltage Interlock CircuitCircuit/Open
- P0D16Battery Charging System A High Voltage Interlock Circuit Performance
- P0D17Battery Charging System A High Voltage Interlock CircuitCircuit Low
- P0D19Battery Charging System A High Voltage Interlock Circuit Intermittent/Erratic
- P0D1AHybrid/EV Battery Pack Coolant Control Valve B Control Circuit/Open
- P0D1BHybrid/EV Battery Pack Coolant Control Valve B Performance/Stuck Off
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.