Network
generic / SAE
U0406
Invalid Data Received from Cruise Control Front Distance Range Sensor
ACC receives bus messages from the radar but their content is implausible (e.g. negative distances, jittering targets). Adaptive cruise is disabled until the radar reports plausible data again.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number4 / 06
Possible causes
- Radar obstructed by snow/dirt high
- Radar misaligned after collision 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: hard
- DIY: shop recommended
- Estimated cost: 80–1500 €
- Estimated time: 0.5–3 h
- Component: acc radar
- MIL / check engine light
Sources
References
sae:J2012