P2C97Hybrid/EV Battery Disable Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P2C97 is set when the high-voltage battery's wired disable input sits below its valid range, typically because the line is chafed through to body ground or the sending module pulls it low permanently. Whether low means shut down depends on the design. Where the line is active-low, a short to ground looks like a constant request to open the contactors, and the battery stays switched off; where a defined level is expected, the controller simply loses a trustworthy signal. The safety value of a hard-wired path is shown in Volkswagen patent US9586481B2, where it opens the contactor faster than a CAN message. No manufacturer documents P2C97 publicly. A shorted line should be traced section by section between the sender and the battery connector. CARB requires monitoring of hybrid components.
- What you may notice
- High-voltage battery stays switched off, no ready mode
- High-voltage system warning
- Likely causes
- LikelyDisable line chafed and shorted to ground
- PossibleSending module holding the line low permanently
- RareWater in the connector creating a leakage path to ground
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.