U1114
Lost Communication with Main Switch Module
U1114 is an OBD-II diagnostic trouble code meaning: Lost Communication with Main Switch Module. Common causes: broken or damaged can bus wires, short circuit in communication circuit. Estimated repair cost: $33–167.
Symptoms
- Failure of comfort systems (windows, lighting)
- The indicator light on the dashboard comes on
- Incorrect operation of the central locking
- Lack of response to commands from the key fob
- Errors in other vehicle systems
Causes
- Broken or damaged CAN bus wires
- Short circuit in communication circuit
- Main control module malfunction
- Module power problems
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect the connectors and contacts of the main module
- Check the power supply and ground of the module
- Scan other modules for communication errors
- If necessary, replace the main control module
Related codes
FAQ
What does the U1114 code mean?
U1114 is an OBD-II diagnostic trouble code that indicates: Lost Communication with Main Switch Module
What causes a U1114 error code?
The most common causes of U1114 include: Broken or damaged CAN bus wires; Short circuit in communication circuit; Main control module malfunction; Module power problems.
How do I fix a U1114 diagnostic trouble code?
To fix U1114: Check the integrity of the CAN bus wiring. Inspect the connectors and contacts of the main module. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1114?
Yes, but get it checked soon
How much does it cost to fix U1114?
The estimated repair cost for U1114 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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