OBD-II code · Network
U04A8 Invalid Data Received From Hybrid/EV Battery Interface Control Module H
A receiving module detected implausible data from hybrid/EV battery interface module H. Cell-voltage, current or temperature values fail plausibility checks against other inputs and are rejected.
Is it safe to drive with U04A8?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Hv Battery Interface Module H
Related codes
- U04A1Invalid Data Received From Hybrid/EV Battery Interface Control Module A
- U04A2Invalid Data Received From Hybrid/EV Battery Interface Control Module B
- U04A3Invalid Data Received From Hybrid/EV Battery Interface Control Module C
- U04A5Invalid Data Received From Hybrid/EV Battery Interface Control Module E
- U04A6Invalid Data Received From Hybrid/EV Battery Interface Control Module F
- U04A7Invalid Data Received From Hybrid/EV Battery Interface Control Module G
- U04A9Invalid Data Received From Hybrid/EV Battery Interface Control Module I
- U04AAInvalid Data Received From Hybrid/EV Battery Interface Control Module J
- U04ABInvalid Data Received From Hybrid/EV Battery Interface Control Module K
- U04ACInvalid Data Received From Hybrid/EV Battery Interface Control Module L
- U04ADInvalid Data Received From Hybrid/EV Battery Interface Control Module M
- U04AEInvalid Data Received From Hybrid/EV Battery Interface Control Module N
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.