U04B0 code meaning
Invalid Data Received From Hybrid/EV Battery Interface Control Module P
Network system Generic code U04xx codes Check engine light
What U04B0 means
U04B0 closes the series: interface module P is the sixteenth and last letter the code lists provide for these boards, with U01AF for lost contact and U0349 for a software mismatch. Packs with more than sixteen monitored sections do exist, such as Ultium batteries with up to 24 modules, so either several modules share one board or the maker uses its own codes beyond P; which applies is not published. The next code, U04B1, already belongs to a different device, the battery monitor module. As with the other letters, U04B0 means the battery controller receives P's messages but finds their content unusable, which leads to power limits and a warning. No manufacturer documents U04B0 publicly.
U04B0 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor2 to 10 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U04B0
- High-voltage system warning
- Power and charging limited
Common causes of U04B0
- PossibleInterface control module P faulty
- PossibleContact fault on the internal link to module P
- Less likelyBattery controller software misreading module P
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 p
What each part of U04B0 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B0 | The exact fault in that area. |
What to do next
- Note U04B0 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 U04B0
What does U04B0 mean?
U04B0 means "Invalid Data Received From Hybrid/EV Battery Interface Control Module P". U04B0 closes the series: interface module P is the sixteenth and last letter the code lists provide for these boards, with U01AF for lost contact and U0349 for a software mismatch. It is a generic code, so it means the same on every make.
Is it safe to drive with U04B0?
Drive gently and only to a workshop. With U04B0 the car can go into limp mode (reduced power) to protect itself.
Will U04B0 fail an emissions test?
Yes, it can. U04B0 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 U04B0 to fix?
Difficulty: workshop only. A typical repair takes 2 to 10 hours of work. This is a job for a workshop.
Will U04B0 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.