U011B
Lost Communication With Rocker Arm Control Module A
U011B is an OBD-II diagnostic trouble code meaning: Lost Communication With Rocker Arm Control Module A. Common causes: open or short circuit in the module communication circuit, malfunction of the rocker control module. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unstable idling
- Engine does not go to full power
Causes
- Open or short circuit in the module communication circuit
- Malfunction of the rocker control module
- Problems with module power supply (blown fuse)
- Poor contact in module connectors
- Main control unit (ECU) malfunction
How to Fix
- Check fuses associated with the VVT system
- Inspect the wiring harness and module connectors for damage.
- Check the power and ground of the control module
- Test the rocker control module
- If necessary, replace the control module
Related codes
Error U011B by Vehicle Brand
FAQ
What does the U011B code mean?
U011B is an OBD-II diagnostic trouble code that indicates: Lost Communication With Rocker Arm Control Module A
What causes a U011B error code?
The most common causes of U011B include: Open or short circuit in the module communication circuit; Malfunction of the rocker control module; Problems with module power supply (blown fuse); Poor contact in module connectors.
How do I fix a U011B diagnostic trouble code?
To fix U011B: Check fuses associated with the VVT system. Inspect the wiring harness and module connectors for damage.. Check the power and ground of the control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U011B?
Yes, but get it checked soon
How much does it cost to fix U011B?
The estimated repair cost for U011B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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