U0597 code meaning
Invalid Data Received From AC/DC Converter Control Module A
Network system Generic code U05xx codes Check engine light
What U0597 means
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.
U0597 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0597
- AC charging stops or runs at reduced rate
- Electric-only mode unavailable on plug-in hybrids
- Warning lamps such as ESC or check engine
Common causes of U0597
- 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- PossibleCharger or battery controller software out of date
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ac dc converter module a
What each part of U0597 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 97 | The exact fault in that area. |
What to do next
- Note U0597 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0597
What does U0597 mean?
U0597 means "Invalid Data Received From AC/DC Converter Control Module A". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0597?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will U0597 fail an emissions test?
Yes, it can. U0597 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0597 to fix?
Difficulty: hard. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will U0597 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.