• Airbag warning light on
• Inoperative airbag system
• Possible malfunction in other safety systems
• Faulty Restraints Control Module (RCM)
• Open or short in the CAN bus wiring
• Faulty connectors or poor electrical connections
RCM: Restraints Control Module
CAN bus: Controller Area Network bus, a vehicle communication system
• U0155
• U0140
Your car's computer can't talk to the control system that helps with things like power windows or door locks.
The U0151 code indicates a loss of communication with the Restraints Control Module (RCM).
U0151 is a diagnostic trouble code (DTC) for 'Lost Communication With Restraints Control Module (RCM)'. This code means that the vehicle's control modules are not able to communicate with the RCM over the Controller Area Network (CAN) bus.
• Check for additional codes that may indicate a wiring issue.
• Inspect the CAN bus wiring and connectors for damage or corrosion.
• Test the Restraints Control Module for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the Restraints Control Module if faulty.
• Clear the codes and test the system for proper communication.
• OBD-II scanner
• Multimeter
• CAN bus diagnostic tool
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect electrical connectors and wiring.
• Avoid water exposure to electronic components.
• Schedule routine diagnostic checks.
Communication Error
• Consult a professional mechanic for diagnosis.
• Do not ignore the airbag warning light.
• Ensure all safety systems are operational.
Check with your vehicle manufacturer for warranty coverage on electronic components.
U0151 has been a common code since the introduction of advanced safety systems and CAN bus communication in vehicles.
High – This code affects the vehicle's safety systems, which are critical for occupant protection.
Driving with an inoperative airbag system can be dangerous and may violate safety regulations.
• Vehicle ignition in the ON position.
• Ensure battery voltage is within normal range.
The Restraints Control Module is typically located under the center console or beneath the dashboard.
Q: Can I drive my car with a U0151 code?
A: It's not recommended, as the airbag system may not function properly in an accident.
Q: Will disconnecting the battery clear the U0151 code?
A: Disconnecting the battery may temporarily clear the code, but it won't fix the underlying issue.
