U0138
Lost Communication With All Terrain Control Module
U0138 is an OBD-II diagnostic trouble code meaning: Lost Communication With All Terrain Control Module. Common causes: open or short circuit in the module power supply circuit, damage to the wiring harness to the module. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Disabling off-road control systems
- No response to the driving mode switch
- Occurrence of other related CAN bus errors
- Reduced functionality in off-road conditions
Causes
- Open or short circuit in the module power supply circuit
- Damage to the wiring harness to the module
- Malfunction of the off-road control module itself
- Problems with the CAN bus
- Blown module fuse
How to Fix
- Check fuses associated with the module
- Inspect the wiring harness for damage
- Check the power supply and ground of the module
- Scan the CAN bus for other errors
- If necessary, replace the off-road control module
Related codes
Error U0138 by Vehicle Brand
FAQ
What does the U0138 code mean?
U0138 is an OBD-II diagnostic trouble code that indicates: Lost Communication With All Terrain Control Module
What causes a U0138 error code?
The most common causes of U0138 include: Open or short circuit in the module power supply circuit; Damage to the wiring harness to the module; Malfunction of the off-road control module itself; Problems with the CAN bus.
How do I fix a U0138 diagnostic trouble code?
To fix U0138: Check fuses associated with the module. Inspect the wiring harness for damage. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0138?
Yes, but get it checked soon
How much does it cost to fix U0138?
The estimated repair cost for U0138 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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