U04A5Invalid Data Received From Hybrid/EV Battery Interface Control Module E
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Module E is the fifth interface board in a high-voltage pack, and U04A5 says its data reach the battery controller in a form that fails the checks. This is one of three letters Volkswagen spells out: for the ID.4 of model years 2021 to 2024 the on-car analysis list of July 2024 groups U04A5 with U04A1 and U04A9, all stored in address 8C, and asks dealers to phone the VW helpline before any repair. The list gives no thresholds and does not explain why only A, E and I appear; the gap of four letters between them is visible but not documented. Wikipedia describes the ID.4 pack as nine or twelve modules. Silence from E is U01A4, a software mismatch U033E. The car shows an electrical system message.
- What you may notice
- Electrical system warning message
- Drive power or charging limited
- Likely causes
- LikelySoftware issue in the battery electronics (VW ID.4, clarify with helpline)
- PossibleInterface control module E internally faulty
- RareContact fault on the internal link to module E
- 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 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.