U0108
Lost Communication With Alternative Fuel Control Module
U0108 is an OBD-II diagnostic trouble code meaning: Lost Communication With Alternative Fuel Control Module. Common causes: open or short circuit in the communication circuit, alternate fuel control module malfunction. Estimated repair cost: $33–167.
Symptoms
- Switching to the main fuel type
- Check Engine light comes on
- Reduced engine power
- Starting problems on alternative fuel
- Unstable engine operation
Causes
- Open or short circuit in the communication circuit
- Alternate fuel control module malfunction
- Problems with module power supply (fuse blown)
- Corrosion of electrical connectors
- Vehicle CAN bus malfunction
How to Fix
- Check Alternate Fuel Module fuses
- Inspect connectors and wiring for damage
- Check the integrity of the CAN bus
- Test the alternative fuel module
- If necessary, replace the control module
Related codes
Error U0108 by Vehicle Brand
FAQ
What does the U0108 code mean?
U0108 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Alternative Fuel Control Module
What causes a U0108 error code?
The most common causes of U0108 include: Open or short circuit in the communication circuit; Alternate fuel control module malfunction; Problems with module power supply (fuse blown); Corrosion of electrical connectors.
How do I fix a U0108 diagnostic trouble code?
To fix U0108: Check Alternate Fuel Module fuses. Inspect connectors and wiring for damage. Check the integrity of the CAN bus. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0108?
Limited driving only, diagnose soon
How much does it cost to fix U0108?
The estimated repair cost for U0108 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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