OBD-II code · Powertrain (generic, extended)
P2C46 Battery Isolation/Voltage Stabilization Control Circuit High
The battery isolation/voltage stabilization module reports a control circuit high condition. Power supply quality during start/stop or load shedding is impaired.
Is it safe to drive with P2C46?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen module input
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Battery Isolation Module, Wiring Harness, Ecm
Related codes
- P2C43Battery Isolation/Voltage Stabilization Control Circuit
- P2C44Battery Isolation/Voltage Stabilization Control Circuit Performance
- P2C45Battery Isolation/Voltage Stabilization Control Circuit Low
- P2C47Battery Isolation/Voltage Stabilization Control Circuit Intermittent
- P2C48Coolant Pump C Control Circuit Performance/Stuck Off
- P2C49Coolant Pump D Control Circuit Performance/Stuck Off
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.