Network
generic / SAE
U023E
Lost Communication With Front Distance Range Sensor - Right
ECU lost communication with the front distance range sensor (radar/lidar) on the left. A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number2 / 3E
Possible causes
- Sensor unpowered or wiring broken high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec 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: 200–2000 €
- Estimated time: 1–6 h
- Component: front distance sensor r
- Component: can bus
- MIL / check engine light
- drive cycle required
- limp mode possible
Sources
References
sae:J2012