U049C code meaning
Invalid Data Received From Battery Charger Control Module A
What U049C means
U049C means the on-board charger, battery charger control module A, is heard on the bus but reports values the battery controller considers invalid. Ford's 2019 OBD summary for hybrid and plug-in vehicles has the BECM set it when the charger's CAN signal shows invalid states for 5 s; U019B is the same charger missing for 5 s. Ford calls this unit SOBDM or BCCM: it turns mains AC into high-voltage DC and also feeds the 12 V battery. Ford TSB 24-2445 (2023-2024 Mustang Mach-E) finds U049C in the BECM when DC fast charging fails with an error on the charger, and cures it by reprogramming the SOBDM. Charging is refused or stops while driving stays normal; Ford flags charger faults with the amber wrench lamp.
U049C at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U049C
- High-voltage battery does not charge, error shown at the charging station
- Charge fault message or wrench lamp in the cluster
- Driving itself unaffected
Common causes of U049C
- Most likelyCharger module software reporting invalid states, cured by reprogramming
- PossibleSoftware levels of charger and battery controller not matching
- Less likelyInternal fault of the on-board charger
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
On board charger
What each part of U049C means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9C | The exact fault in that area. |
What to do next
- Note U049C 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 U049C
What does U049C mean?
U049C means "Invalid Data Received From Battery Charger Control Module A". U049C means the on-board charger, battery charger control module A, is heard on the bus but reports values the battery controller considers invalid. It is a generic code, so it means the same on every make.
Is it safe to drive with U049C?
U049C does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U049C fail an emissions test?
U049C 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 U049C to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U049C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.