U057D code meaning
Invalid Data Received From Off-Board Charger Control Module
What U057D means
Despite its name, the off-board charger control module sits inside the vehicle: it conducts the dialogue with an external DC fast charger, which under CCS runs as power line communication on the control pilot contact (ISO 15118, DIN 70121) and under CHAdeMO over a CAN link in the connector. Ford calls this unit the off-board charger controller (OBCC) on the Mustang Mach-E and E-Transit; SSM 50923 had new OBCC software fix interrupted DC fast charging at some EVgo stations. U057D is stored when another module in the car receives frames from this controller but rejects them, for instance because of a wrong counter, a failed checksum or implausible values. No manufacturer documents U057D itself. DC fast charging is likely to stop or refuse to start, while AC charging normally still works.
U057D at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.2 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U057D
- DC fast charging aborts or does not start
- Charging works at other stations
Common causes of U057D
- Most likelyFault or outdated software in the charging station
- PossibleDirty or damaged communication contacts in plug or inlet
- PossibleVehicle charging controller software not compatible with the station
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Off board charger module
What each part of U057D means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7D | The exact fault in that area. |
What to do next
- Note U057D 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 U057D
What does U057D mean?
U057D means "Invalid Data Received From Off-Board Charger Control Module". Despite its name, the off-board charger control module sits inside the vehicle: it conducts the dialogue with an external DC fast charger, which under CCS runs as power line communication on the control pilot contact (ISO 15118, DIN 70121) and under CHAdeMO over a CAN link in the connector. It is a generic code, so it means the same on every make.
Is it safe to drive with U057D?
U057D does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U057D fail an emissions test?
U057D is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U057D to fix?
Difficulty: medium. A typical repair takes 0.2 to 2 hours of work. This is a job for a workshop.
Will U057D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.