Engine-Codes - Generic - U121E

U121E Code - Lost Communication With Steering Wheel Cruise Control Switch

- Code Popularity: 4,836 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U121E?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Steering Wheel Cruise Control Switch
  • Steering Wheel Cruise Control Switch harness is open or shorted
  • Steering Wheel Cruise Control Switch circuit poor electrical connection
  • Faulty Steering Column Control Module (SCCM)
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How to Fix the DTC U121E?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the U121E code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the U121E Code Mean?

The Steering Column Control Module (SCCM) is located near the top of the Steering Column underneath the Steering Wheel. The SCCM includes the Clockspring, the Multi-Function Switch and a Local Interconnect Network (LIN)/Controller Area Network (CAN) C Gateway. LIN Bus messages received by the LIN/CAN C Gateway are broadcast over the CAN C Bus to the appropriate modules.
The Right Steering Wheel Switch (Speed Control Switch) communicates with the Steering Column Control Module (SCCM) through a dedicated LIN Bus. When the SCCM receives a LIN Bus message from the Right Steering Wheel Switch, the SCCM will send a message over the CAN C Bus to the appropriate modules.
The Diagnostic Trouble Code (DTC) sets if the Steering Column Control Module (SCCM) does not detect any communication with the Right Steering Wheel Switch (Speed Control) for greater than five seconds.

U121E Code - Lost Communication With Steering Wheel Cruise Control Switch

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Code U121E Information for Specific Makes

  • U121E Chrysler Lost Communication With Steering Wheel Cruise Control Switch
  • U121E Dodge Lost Communication With Steering Wheel Cruise Control Switch
  • U121E Infiniti Digital Signal Processor Communication
  • U121E Jeep Lost Communication With Steering Wheel Cruise Control Switch
  • U121E Nissan Digital Signal Processor Communication
  • U121E RAM Lost Communication With Steering Wheel Cruise Control Switch

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