Lost Communication With Restraints Control Module (Airbag)
What does U0151 mean?
The U0151 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Restraints Control Module (Airbag). This is a critical severity code.
Common Symptoms
- Airbag warning light illuminated
- Airbag system inoperative
- Seatbelt pretensioners disabled
- Check Engine Light may be on
Probable Causes (Ranked by Likelihood)
- Failed airbag control module Very High
- CAN bus wiring fault to airbag module High
- Airbag module connector corrosion Moderate
- Airbag module power supply loss Moderate
Step-by-Step Diagnostic Procedure
-
Check airbag module power and ground circuits
-
Inspect airbag module connector -- usually under center console
-
Verify CAN bus wiring to airbag module
-
Check for water damage under seats or center console
-
Replace airbag module if communication lost -- requires calibration and VIN programming
Frequently Asked Questions
Can I drive with code U0151?
Drive short distances only. Lost communication codes indicate a module has stopped communicating on the vehicle network. The affected system may not function correctly.
What causes U0151?
The most common cause is a failed module or a wiring issue in the CAN bus network. Failed airbag control module is the most likely cause. Power supply, ground, and connector issues should be checked before replacing any module.
Is U0151 expensive to fix?
Repair costs range from $200 - $1200 (parts and labor). Wiring repairs are on the lower end, while module replacement is on the higher end. The module may also need to be programmed after replacement.