Network
generic / SAE
U043F
Invalid Data Received From Vacuum Sensor B
A receiving module detected implausible data from vacuum sensor B (typically brake booster vacuum). Pressure values fail plausibility checks against engine load and are rejected.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number4 / 3F
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: 80–600 €
- Estimated time: 0.5–2 h
- Component: vacuum sensor b
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012