U121E
Lost Communication With Steering Wheel Cruise Control Switch
U121E is an OBD-II diagnostic trouble code meaning: Lost Communication With Steering Wheel Cruise Control Switch. Common causes: broken or damaged wires in the steering column harness, cruise control switch malfunction. Estimated repair cost: $17–89.
Symptoms
- Cruise control doesn't work
- The malfunction indicator light is on on the dashboard
- Cruise control buttons do not respond when pressed
- The cruise control system turns off spontaneously
Causes
- Broken or damaged wires in the steering column harness
- Cruise control switch malfunction
- Oxidation of contacts in connectors
- Problems with the steering column switch module
- Software error in the ECU
How to Fix
- Check the integrity of the steering column wiring harness
- Test the cruise control switch
- Clean the contacts in the system connectors
- Check the functionality of the steering column switch module
- Reflash the ECU if necessary
Related codes
FAQ
What does the U121E code mean?
U121E is an OBD-II diagnostic trouble code that indicates: Lost Communication With Steering Wheel Cruise Control Switch
What causes a U121E error code?
The most common causes of U121E include: Broken or damaged wires in the steering column harness; Cruise control switch malfunction; Oxidation of contacts in connectors; Problems with the steering column switch module.
How do I fix a U121E diagnostic trouble code?
To fix U121E: Check the integrity of the steering column wiring harness. Test the cruise control switch. Clean the contacts in the system connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U121E?
Yes, but get it checked soon
How much does it cost to fix U121E?
The estimated repair cost for U121E is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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