Network
generic / SAE
U04B1
Invalid Data Received From Battery Monitor Module
A receiving module detected implausible data from the 12-V battery monitor (intelligent battery sensor). Voltage, current or temperature values fail plausibility checks and are rejected; SoC estimation reverts to a default model.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number4 / B1
Possible causes
- Module internal fault or sensor input drift high
- Software version mismatch after replacement medium
- Gateway module routing CAN messages incorrectly low
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
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.5–1.5 h
- Component: battery monitor module
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012