U0119
Lost Communication With Fuel Cell Control Module
U0119 is an OBD-II diagnostic trouble code meaning: Lost Communication With Fuel Cell Control Module. Common causes: open or short circuit in the communication circuit, fuel cell control module malfunction. Estimated repair cost: $167–556.
Symptoms
- Check Engine light comes on
- The car may go into emergency mode
- Reduced engine power
- Problems with charging a high-voltage battery
- Inability to start the engine (in some cases)
Causes
- Open or short circuit in the communication circuit
- Fuel cell control module malfunction
- Connector problems or contact corrosion
- Software failure in the ECU
- Module power problems
How to Fix
- Check the integrity of the wiring harness and connectors
- Check fuses and relays associated with the module
- Scan the system for additional error codes
- Check the power and ground of the control module
- If necessary, replace the fuel cell control module
- Repair only from an authorized dealer
Related codes
Error U0119 by Vehicle Brand
FAQ
What does the U0119 code mean?
U0119 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Fuel Cell Control Module
What causes a U0119 error code?
The most common causes of U0119 include: Open or short circuit in the communication circuit; Fuel cell control module malfunction; Connector problems or contact corrosion; Software failure in the ECU.
How do I fix a U0119 diagnostic trouble code?
To fix U0119: Check the integrity of the wiring harness and connectors. Check fuses and relays associated with the module. Scan the system for additional error codes. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0119?
Do not drive — repair immediately
How much does it cost to fix U0119?
The estimated repair cost for U0119 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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