U02A0 code meaning
Invalid Data Received From Hybrid/EV Battery Interface Control Module D
Network system Generic code U02xx codes Check engine light
What U02A0 means
Although it sits among lost-communication codes, U02A0 is a data error code. The expected slot in the invalid-data series, U04A4, had already gone to particulate matter sensor A, as Ford's 2014 code list and Volkswagen's 2014 Touareg data show, so module D's data fault landed here. Interface modules are the boards in the high-voltage pack that read cell voltages and temperatures and switch cell balancing for the battery controller; GM's 2016 hybrid tables show eight of them, A to H, on a daisy-chained serial link, with a processor test and a balancing test for each board (P1EA0 and P1EA4 for D). U02A0 means module D still answers, but its data fail integrity or plausibility checks. No manufacturer documents U02A0 publicly. A silent D is U01A3. Expect a power limit.
U02A0 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U02A0
- Hybrid or electric system warning
- Reduced power or no charging
- Engine runs more often on hybrids
Common causes of U02A0
- PossibleInterface board D delivering corrupted or implausible data
- PossiblePoor contact in the internal communication chain of the pack
- PossibleMismatched software between battery controller and interface modules
- Less likelyDamaged cell sense lead at module D
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery interface module d
What each part of U02A0 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A0 | The exact fault in that area. |
What to do next
- Note U02A0 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 U02A0
What does U02A0 mean?
U02A0 means "Invalid Data Received From Hybrid/EV Battery Interface Control Module D". Although it sits among lost-communication codes, U02A0 is a data error code. It is a generic code, so it means the same on every make.
Is it safe to drive with U02A0?
Drive gently and only to a workshop. With U02A0 the car can go into limp mode (reduced power) to protect itself.
Will U02A0 fail an emissions test?
Yes, it can. U02A0 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 U02A0 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will U02A0 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.