U0136
NetworkModule Communicationlow severityLost Communication with Leveling Control Module
What U0136 Means
Cannot communicate with the automatic leveling or load-leveling suspension module.
Symptoms
- Headlight auto-leveling disabled
- Vehicle sitting unevenly
- Leveling warning message
Common Causes
- Leveling module failure
- CAN bus wiring
- Module power loss
- Height sensor issue
Diagnostic Steps
- Check leveling module fuse
- Test power and ground
- Check CAN wiring
- Test height sensors
- Inspect leveling actuators
Where to start: Check fuses and height sensor operation. Common issue after suspension work.
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