U0106high severityNetwork
Lost Communication with Glow Plug Control Module
on 1997 Dodge Ram 3500 6.7L I6 Cummins Diesel · 4WD
What this code means
Cannot communicate with the glow plug control module on diesel vehicles.
Symptoms
- Hard cold starting
- Glow plug light stays on
- Extended cranking
- White exhaust smoke on cold start
Common causes
- Glow plug module failure
- CAN bus wiring issue
- Fuse blown
- Module connector corrosion
- Glow plug module water damage
Diagnostic steps
- Check glow plug module fuse
- Test module power and ground
- Inspect module connector
- Check CAN bus wiring
- Test glow plug module directly
Repair notes
Check fuses and power supply. Glow plug modules often fail from heat exposure.
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