Lost Communication With Obstacle Detection Control Module -- Rear
The U0154 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Obstacle Detection Control Module -- Rear. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $150 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Rear cross-traffic alert not working
- Rear parking sensors not functioning
- Backup collision detection disabled
- Service parking assist message
- Rear automatic braking system disabled
Probable Causes (Ranked by Likelihood)
- Failed rear obstacle detection module Very High
- Damaged rear bumper sensor wiring High
- Rear bumper collision damage affecting sensors Moderate
- Rear sensors blocked by debris, ice, or mud Moderate
- Water intrusion in rear sensor connector Low
Step-by-Step Diagnostic Procedure
-
Scan for DTCs in parking assist and obstacle detection modules
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Inspect rear bumper for damage that may have affected sensors
-
Clean all rear parking sensors and radar sensor areas
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Check wiring and connectors at the rear detection module
-
Verify power supply and ground at the module
Frequently Asked Questions
Can I drive with code U0154?
Yes, but use extra caution when backing up. Rear cross-traffic alert and parking sensors will not be functioning. Rely on mirrors, backup camera, and physically looking behind the vehicle.
What causes U0154?
Rear bumper damage is the most common cause. Even minor low-speed impacts can damage the rear detection sensors or their wiring. Dirt and ice buildup can also temporarily block the sensors.
Can I replace rear parking sensors myself?
Individual ultrasonic parking sensors in the bumper can often be replaced as a DIY project. However, radar-based rear detection modules typically require professional installation and calibration.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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