• Doors not locking or unlocking properly
• Warning light on the dashboard
• Inoperative power windows
• Faulty Door Control Module (DCM) 'B'
• Open or shorted wiring harness
• Poor electrical connection
DCM: Door Control Module
OBD-II: On-Board Diagnostics, Second Generation
• U0231
• U0232
Your car has a problem talking to one of its parts, like when a walkie-talkie loses signal. It can't 'hear' what the part is saying.
The vehicle's control module has lost communication with a specific part.
U0230 indicates a loss of communication with the Door Control Module (DCM) 'B'. This means that the main computer in the car is not receiving signals from the DCM 'B', which could affect the operation of the doors.
• Check for other related diagnostic trouble codes (DTCs).
• Inspect the wiring and connectors for damage or corrosion.
• Test the Door Control Module (DCM) 'B' for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the Door Control Module (DCM) 'B' if faulty.
• Clear the codes and test the system.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain electrical connectors.
• Avoid moisture exposure to the vehicle's electronics.
• Perform routine diagnostic checks.
Communication Error
• Have a professional inspect the vehicle if you're not experienced with car electronics.
• Avoid using the vehicle's power features until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for specific warranty coverage on electrical components.
Communication errors like U0230 have been common as vehicles have become more reliant on electronic modules for operation.
Moderate – It may affect vehicle convenience features but is unlikely to impact drivability.
Driving with unresolved communication errors may lead to unexpected vehicle behavior. Always address such issues promptly.
• Vehicle must be running.
• Ensure all doors are closed and locked.
The Door Control Module (DCM) 'B' is typically located within the door panel or near the driver's side dashboard.
Q: Can I drive with a U0230 code?
A: Yes, but you may experience issues with door locks or windows. It's best to have it checked soon.
Q: Will fixing the wiring clear the code?
A: Repairing the wiring may resolve the issue, but you'll need to clear the code with an OBD-II scanner.
