U0597Invalid Data Received From AC/DC Converter Control Module A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- In plug-in hybrids and electric cars the AC/DC converter is normally the on-board charger: it rectifies mains power and controls the current into the traction battery. CARB requires plug-in hybrids to detect charger faults that stop charging or reduce its rate. U0597 is logged when the charger's messages about state, voltage or current fail validation at the battery or vehicle controller. Public maker texts for U0597 are missing; the partner U0296 is documented by Volvo, whose 2022-on XC60 and XC90 plug-in hybrids store BCM2-U029600 together with an ESC warning and a blocked pure electric mode when a third-party dongle or Y-splitter loads the diagnostic connector. Interference of that kind can just as well corrupt data, so check for such devices first.
- What you may notice
- AC charging stops or runs at reduced rate
- Electric-only mode unavailable on plug-in hybrids
- Warning lamps such as ESC or check engine
- Likely causes
- PossibleThird-party dongle or Y-splitter on the diagnostic connector disturbing the bus (Volvo TJ 36559)
- PossibleOn-board charger electronics faulty or overheated
- PossibleCharger or battery controller software out of date
- 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: €0 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.