P2C93Hybrid/EV Battery Contactor Control Supply Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- With P2C93 the supply for the contactor drivers is present but does not behave as it should: it sags when a coil is switched on, ripples, or recovers too slowly before the next contactor in the closing sequence. A high-resistance contact or a weak feed therefore shows up here rather than as an open circuit. LG Energy Solution patent US12007445B2 describes the matching logic: before every contactor closes, the controller compares the supply with a minimum, waits and repeats the comparison if it is short, and only after a set number of failed tries records a supply fault. No manufacturer documents P2C93 publicly. For the driver the effect is often intermittent: the car may need several attempts to become ready or abort charging. CARB requires functional checks of hybrid components.
- What you may notice
- Several attempts needed before the vehicle is ready
- Charging stops unexpectedly
- Intermittent hybrid or EV warning
- Likely causes
- LikelyCorroded or loose contact in the supply feed causing voltage drop
- PossibleWeak 12 V battery or ground connection sagging under coil load
- RareContactor coil drawing excessive current or driver stage faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.