U0181low severityNetwork
Lost Communication With Headlamp Leveling Control Module
on 2013 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
The network has lost communication with the headlamp leveling control module. This can cause improper headlight aim.
Symptoms
- Headlight leveling not working
- Lighting warning message
- Headlamps aimed too high or low
Common causes
- Faulty bus wiring or connectors
- Poor ground connection
- Failed headlamp leveling module
- Blown fuse
Diagnostic steps
- Scan modules for communication codes
- Check module power and ground
- Inspect bus wiring and connectors
- Verify bus signal integrity
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus