AutoCodes – Jeep – U121E Jeep

U121E Jeep Code - Lost Communication With Steering Wheel Cruise Control Switch

Quick Answer

The Steering Column Control Module (SCCM) is located near the top of the Steering Column underneath the Steering Wheel. Common causes include 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. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U121E Jeep indicates Lost Communication With Steering Wheel Cruise Control Switch.
Common causes: Common causes include 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.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,385

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U121E Jeep Description

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.

OBDII Code U121E Jeep - Lost Communication With Steering Wheel Cruise Control Switch - AutoCodes.com — U121E Jeep Code - Lost Communication With Steering Wheel Cruise Control Switch

What does this mean?

What are the Possible Causes of the DTC U121E Jeep?

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)

How to Fix the DTC U121E Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U121E Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U121E Jeep Code

1. What are some common symptoms of the OBDII code U121E in a Jeep related to lost communication with the steering wheel cruise control switch?

- Common symptoms include the cruise control not working, the cruise control light on the dashboard remaining illuminated, and possible issues with other steering wheel controls.

2. What are the potential causes of the U121E code indicating lost communication with the steering wheel cruise control switch in a Jeep?

- The code U121E can be triggered by a faulty cruise control switch, damaged wiring or connectors in the steering wheel, a malfunctioning clock spring, or a problem with the body control module.

3. How can I diagnose the U121E code in my Jeep related to lost communication with the steering wheel cruise control switch?

- Diagnosis typically involves checking the cruise control switch for proper functioning, inspecting the wiring and connectors in the steering wheel, testing the clock spring for continuity, and scanning the body control module for any related fault codes.

4. Can I still drive my Jeep safely with the U121E code indicating lost communication with the steering wheel cruise control switch?

- While it is generally safe to drive with this code, you may experience issues with the cruise control functionality, so it is recommended to address the problem promptly to avoid potential inconvenience.

5. How can I repair the U121E code in my Jeep caused by lost communication with the steering wheel cruise control switch?

- Repairs may involve replacing the cruise control switch, repairing or replacing damaged wiring and connectors, fixing the clock spring if faulty, or reprogramming the body control module as needed.

6. Is it possible to reset the U121E code related to lost communication with the steering wheel cruise control switch in a Jeep without repairing the underlying issue?

- While clearing the code using an OBDII scanner can temporarily turn off the check engine light, the problem will likely persist until the root cause is identified and fixed.

7. What are some DIY tips for troubleshooting the U121E code in a Jeep due to lost communication with the steering wheel cruise control switch?

- You can start by checking the cruise control buttons for responsiveness, inspecting the steering wheel wiring for any visible damage, and ensuring all connections are secure before seeking professional help if needed.

8. Can a malfunctioning clock spring cause the U121E code indicating lost communication with the steering wheel cruise control switch in a Jeep?

- Yes, a faulty clock spring, which is responsible for transferring electrical signals between the steering wheel and the vehicle, can lead to the U121E code being triggered.

9. How long does it typically take to repair the U121E code related to lost communication with the steering wheel cruise control switch in a Jeep?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 1 to 3 hours for a professional technician to diagnose and fix the problem.

10. Is it recommended to seek professional assistance for resolving the U121E code caused by lost communication with the steering wheel cruise control switch in a Jeep?

- Yes, since the diagnosis and repair of this code may involve complex electrical components and systems, it is advisable to consult a qualified mechanic or dealership for accurate troubleshooting and resolution.