Lost Communication with Trunk/Liftgate Module
2010-2010 Buick Enclave 3.6L V6
The 2010 Buick Enclave is equipped with a 3.6L V6 engine. Below you'll find detailed u0203 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Cannot communicate with the power trunk lid or liftgate control module.
Symptoms
- Power liftgate not opening
- Trunk release not working
- Liftgate position unknown
- Hands-free liftgate disabled
Common Causes
- Liftgate module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Liftgate strut motor failure
Diagnostic Steps
- Check liftgate module fuse
- Test power and ground
- Check CAN wiring
- Test liftgate motor
- Check liftgate latch sensor
Repair Notes
Check fuses. Wiring at liftgate hinge flexes and commonly breaks.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0203 on Other Vehicles
Common Questions
What does code U0203 mean on a 2010-2010 Buick Enclave?
U0203 stands for "Lost Communication with Trunk/Liftgate Module". Cannot communicate with the power trunk lid or liftgate control module.
What are the symptoms of U0203 on a Buick Enclave?
Common symptoms of U0203 include: Power liftgate not opening, Trunk release not working, Liftgate position unknown, Hands-free liftgate disabled.
What causes U0203 on a 2010-2010 Buick Enclave?
Common causes of U0203 include: Liftgate module failure, CAN bus wiring, Module power loss, Fuse blown, Liftgate strut motor failure.
Last updated: March 2026