OBD-II code · Network
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.
Is it safe to drive with U0406?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyRadar obstructed by snow/dirt
- PossibleRadar misaligned after collision
- 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
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Acc Radar
Related codes
- U0403Invalid Data Received from Transfer Case Control Module
- U0404Invalid Data Received from Gear Shift Control Module
- U0405Invalid Data Received from Cruise Control Module
- U0407Invalid Data Received from Steering Angle Sensor Module
- U0408Invalid Data Received from Vehicle Immobilizer Control Module
- U0409Invalid Data Received from Vehicle Security Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.