Lost Communication with Collision Avoidance Module
2021-2021 Buick Enclave 3.6L V6
The 2021 Buick Enclave is equipped with a 3.6L V6 engine. Below you'll find detailed u0253 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Cannot communicate with the pre-collision or collision mitigation control module.
Symptoms
- Pre-collision warning disabled
- Automatic emergency braking off
- Collision avoidance system fault
- Safety system warning light
Common Causes
- Collision avoidance module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Sensor obstruction
- Calibration needed
Diagnostic Steps
- Check module fuse
- Test power and ground
- Check CAN wiring
- Clean all sensors
- Check for sensor calibration need
- Inspect front fascia for damage
Repair Notes
Safety critical ADAS system. Check fuses and sensor condition. Requires professional calibration after service.
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
U0253 on Other Vehicles
Common Questions
What does code U0253 mean on a 2021-2021 Buick Enclave?
U0253 stands for "Lost Communication with Collision Avoidance Module". Cannot communicate with the pre-collision or collision mitigation control module.
What are the symptoms of U0253 on a Buick Enclave?
Common symptoms of U0253 include: Pre-collision warning disabled, Automatic emergency braking off, Collision avoidance system fault, Safety system warning light.
What causes U0253 on a 2021-2021 Buick Enclave?
Common causes of U0253 include: Collision avoidance module failure, CAN bus wiring, Module power loss, Fuse blown, Sensor obstruction, Calibration needed.
Last updated: March 2026