Network
generic / SAE
U041A
Invalid Data Received From Battery Isolation/Voltage Stabilization Control Module
A receiving module detected implausible data from the battery isolation / voltage stabilization module (typical in start/stop systems). Switching state or stabilizer voltage values fail plausibility checks and are rejected.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number4 / 1A
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: medium
- DIY: shop recommended
- Estimated cost: 120–1200 €
- Estimated time: 0.5–3 h
- Component: battery isolation module
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012