U0162moderate severityNetwork
Lost Communication with Convertible Roof Module
on 2004 Cadillac STS 4.6L V8 · RWD
What this code means
Cannot communicate with the convertible top or retractable hardtop control module.
Symptoms
- Convertible top not operating
- Top stuck partially open
- Top warning light on
- Top controls unresponsive
Common causes
- Top module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Hydraulic pump failure
- Trunk latch sensor issue
Diagnostic steps
- Check top module fuse
- Test power and ground
- Check CAN wiring
- Test top hydraulic system
- Check trunk and boot sensors
Repair notes
Check fuses and trunk latch sensors. Top operation requires all latches and sensors to confirm position.
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