Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Jeep Cherokee TrailhawkFACTORY OEM SERVICE PROCEDURE
Module, Steering Column Control (SCCM)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B178F-92 | TURN SIGNAL SWITCH - PERFORMANCE OR INCORRECT OPERATION |
| B2225-00 | SCM STEERING COLUMN MODULE INTERNAL |
| B2300-29 | FRONT WIPER MODE SWITCH-SIGNAL INVALID |
| B2306-2A | FRONT-WASHER-SWITCH-STUCK |
| B2309-29 | REAR WIPER SWITCH - SIGNAL INVALID |
| B232E-00 | REAR WASHER SWITCH STUCK |
| B232E-2A | REAR WASHER STUCK |
| B232F-00 | MIST SWITCH STUCK |
| B23A1-2A | FLASH TO PASS/OPTICAL HORNSWITCH - STUCK |
| C2129-16 | BATTERY VOLTAGE - CIRCUIT VOLTAGE BELOW THRESHOLD |
| C2129-17 | BATTERY VOLTAGE - CIRCUIT VOLTAGE ABOVE THRESHOLD |
| P0815-2A | UPSHIFT SWITCH - STUCK |
| P0816-2A | DOWNSHIFT SWITCH-STUCK |
| P0826-11 | UP/DOWN SHIFT SWITCH-CIRCUIT SHORT TO GROUND |
| P0826-13 | UP-DOWN SHIFT SWITCH - CIRCUIT OPEN |
| P0826-15 | UP/DOWN SHIFT SWITCH-CIRCUIT SHORT TO BATTERY OR OPEN |
| U0001-00 | CAN C BUS |
| U0002-00 | CAN C BUS OFF PERFORMANCE |
| U0100-00 | LOST COMMUNICATION WITH ECM/PCM |
| U0140-00 | LOST COMMUNICATION WITH BODY CONTROL MODULE |
| U0401 | IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM |
| U0422 | IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE |
| U1008-00 | LIN 1 BUS |
| U121E-00 | LOST COMMUNICATION WITH STEERING WHEEL CRUISE CONTROL SWITCH |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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