U0199moderate severityNetwork
Lost Communication with Door Control Module A
on 2001 Cadillac DeVille 4.6L V8 Northstar · FWD
What this code means
Cannot communicate with door control module A (usually driver door).
Symptoms
- Power windows not working
- Door locks inoperative from that door
- Mirror control not working
Common causes
- Module failure
- Wiring in door jamb broken
- Water damage in door
- Connector issue
Diagnostic steps
- Inspect door jamb wiring
- Check for water in door
- Test module power
- Check connector
Repair notes
Inspect door jamb wiring harness - flexing breaks wires over time.
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