What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
U121E-00Lost Communication With Steering Wheel Cruise Control SwitchManufacturer communications
9Original wording in English
JEEP
Reported code forms U121E-00
Not applicable to vehicles built for US market. Multiple Systems Repair Bundle Campaign Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the…
JEEP
Reported code forms U121E-00
"Rear Windshield Wipers Operate Continuously Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ●…
JEEP
Reported code forms U121E-00
Flash: Body Control Module (BCM) Updates This bulletin involves reprogramming the Body Control Module (BCM) with the latest available software. Customer may describe various LIN related functions (steering wheel, center…
JEEP
Reported code forms U121E-00
Flash: Body Control Module (BCM) Updates This bulletin involves reprogramming the Body Control Module (BCM) with the latest available software. Customer may describe various LIN related functions (steering wheel, center…
JEEP
Reported code forms U121E-00
Flash: Body Control Module (BCM) Updates This bulletin involves reprogramming the Body Control Module (BCM) with the latest available software. Customer may describe various LIN related functions (steering wheel, center…
JEEP
Reported code forms U121E-00
Flash: Body Control Module (BCM) Updates This bulletin involves reprogramming the Body Control Module (BCM) with the latest available software. Customer may describe various LIN related functions (steering wheel, center…
Check vehicle applicability
11A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Jeep | COMPASS | 2024 |
| Jeep | COMPASS | 2023 |
| Jeep | COMPASS | 2022 |
| Jeep | GRAND CHEROKEE | 2021 |
| Jeep | GRAND CHEROKEE 4XE | 2022 |
| Jeep | GRAND WAGONEER | 2022 |
| Jeep | WAGONEER | 2022 |
| Jeep | WRANGLER | 2025 |
| Jeep | WRANGLER | 2024 |
| Jeep | WRANGLER 4XE | 2025 |
| Jeep | WRANGLER 4XE | 2024 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.