U121E RAM 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 RAM 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.
Code U121E RAM Description
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.
What are the Possible Causes of the DTC U121E RAM?
- 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 RAM?
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 RAM 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.
Need more information about the U121E RAM code?
Need more information on how to fix the U121E RAM code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U121E RAM code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U121E RAM Code
1. What are the common symptoms of OBDII code U121E in a RAM, indicating a lost communication with the steering wheel cruise control switch?
- Common symptoms include the cruise control not working, the cruise control light staying on, and the inability to set or adjust cruise control speed.
2. What are the possible causes of OBDII code U121E in a RAM?
- The code U121E is typically triggered by a faulty steering wheel cruise control switch, damaged wiring or connectors related to the switch, or a malfunction in the vehicle's communication network.
3. How can I diagnose the issue causing OBDII code U121E in my RAM?
- To diagnose the issue, it is recommended to inspect the wiring and connectors related to the steering wheel cruise control switch, check for any visible damage, and perform a scan of the vehicle's communication network using a diagnostic tool.
4. Is it safe to continue driving my RAM with OBDII code U121E triggered?
- It is generally safe to drive the vehicle with this code, as it primarily affects the cruise control function. However, it is advisable to have the issue diagnosed and repaired to restore full functionality.
5. Can I repair OBDII code U121E in my RAM myself?
- Depending on your level of automotive expertise, you may be able to repair the issue yourself by checking and repairing any damaged wiring or connectors. If in doubt, it is recommended to seek professional help.
6. Will resetting the OBDII code U121E in my RAM make the issue disappear?
- Resetting the code may temporarily clear the error, but if the underlying issue such as a faulty cruise control switch or wiring problem is not addressed, the code is likely to reappear.
7. How much does it typically cost to repair OBDII code U121E in a RAM at a dealership or repair shop?
- The cost of repairing this code can vary depending on the specific issue, but it may involve parts replacement, wiring repairs, or labor costs. Contact your local dealership or repair shop for a more accurate estimate.
8. Are there any preventive measures to avoid triggering OBDII code U121E in the future?
- Regularly checking the condition of the cruise control switch, avoiding any rough handling of the steering wheel controls, and ensuring proper maintenance of the vehicle's electrical system can help prevent this code from reoccurring.
9. Can extreme weather conditions or rough terrain cause OBDII code U121E to trigger in a RAM?
- While extreme conditions may not directly cause this code, they can sometimes exacerbate existing issues with the cruise control switch or wiring, leading to the triggering of code U121E.
10. How long does it typically take to repair OBDII code U121E in a RAM?
- The repair time can vary depending on the exact cause of the issue and the complexity of the repair needed. Minor repairs may take a few hours, while more involved repairs could take longer.
Discuss the causes and fixes for U121E RAM OBDII Code
Code U121E RAM comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
