P0CA7Hybrid/EV Battery Discharging Current High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0CA7 is set when more current flows out of the hybrid or EV battery than the controller allows. Audi documents it on 48 V mild hybrids (A6, A7, A8, later also Q7, Q8 and S/RS versions, 2018 to 2024): the battery management of the 48 V battery, J1120, stores P0CA700 as discharge current too high, often with U046900 in the engine module, and the cluster shows an electrical system warning. Audi's 2020 bulletin 2058831/1 fixes it with new software for the belt starter generator; revision 9 from 2023 adds a hardware test of that generator. Stellantis lists P0CA7-00 in bulletin 08-054-22 for the 2021 Wrangler 4xe among codes that light the MIL falsely and are cured by a battery pack control module flash. P0CA6 covers the charging direction.
- What you may notice
- Electrical system or battery warning in the cluster
- Start-stop or electric assistance temporarily unavailable
- Check-engine lamp on plug-in hybrids
- Likely causes
- LikelyStarter/generator or battery module software (Audi 2058831, Stellantis 08-054-22)
- PossibleBelt starter generator drawing excessive current
- RareBattery current sensor or battery management misreading
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €0 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.