U0412Invalid Data Received From Battery Energy Control Module A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- U0412 is stored when the hybrid or engine controller receives data from battery energy control module A, the management unit of the high-voltage battery, that it rejects as invalid. Volkswagen's 2014 Jetta Hybrid OBD chart sets it on implausible received data. FCA lists U0412-00 for the 2019 Chrysler Pacifica plug-in hybrid (TSB 08-114-22) among codes that light the MIL and can remain as permanent codes, so the vehicle fails a state smog check; the fix is new software for the hybrid control processors, not a battery part. CARB requires emission-related control units to be monitored, which explains the MIL. U0111 means lost contact, U0413 covers module B, U0312 a software mismatch. Charging or electric driving may be limited.
- What you may notice
- Check engine light on, code may become permanent
- Charging or electric driving limited
- Hybrid system warning message
- Likely causes
- LikelySoftware error in hybrid controller or battery management (FCA: reflash HCP/AHCP)
- PossibleBus wiring or connector fault between battery module and hybrid controller
- RareWeak 12 V battery disturbing module start-up
- RareBattery energy control module internally faulty
- 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: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.