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 Compass TrailhawkFACTORY OEM SERVICE PROCEDURE
Sensor, Left Blind Spot (LBSS)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B2199-16 | BATTERY VOLTAGE - CIRCUIT VOLTAGE BELOW THRESHOLD |
| B2199-17 | BATTERY VOLTAGE-CIRCUIT VOLTAGE ABOVE THRESHOLD |
| B21DD-84 | SYSTEM VOLTAGE-SIGNAL BELOW ALLOWABLE RANGE |
| B21DD-85 | SYSTEM VOLTAGE-SIGNAL ABOVE ALLOWABLE RANGE |
| B223B-00 | VEHICLE CONFIGURATION MISMATCH |
| B22A9-02 | ECU INTERNAL PERFORMANCE-GENERAL SIGNAL FAILURE |
| B22A9-04 | ECU INTERNAL PERFORMANCE-SYSTEM INTERNAL FAILURES |
| B22A9-11 | ECU INTERNAL PERFORMANCE-CIRCUIT SHORT TO GROUND |
| B22A9-15 | ECU INTERNAL PERFORMANCE-CIRCUIT SHORT TO BATTERY OR OPEN |
| B22A9-49 | ECU INTERNAL PERFORMANCE-INTERNAL ELECTRONIC FAILURE |
| B22A9-64 | ECU INTERNAL PERFORMANCE-SIGNAL PLAUSIBILITY FAILURE |
| B22A9-97 | ECU INTERNAL PERFORMANCE-COMPONENT OR SYSTEM OPERATION OBSTRUCTED OR BLOCKED |
| U0010-00 | CAN INTERIOR BUS |
| U0011-00 | CAN INTERIOR BUS OFF PERFORMANCE |
| U0140-00 | LOST COMMUNICATION WITH BODY CONTROL MODULE |
| U0155-00 | LOST COMMUNICATION WITH CLUSTER-CCN |
| U0252-00 | LOST COMMUNICATION WITH TRAILER LIGHTING MODULE |
| U0422-00 | IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE |
| U0423-00 | IMPLAUSIBLE DATA RECEIVED FROM CLUSTER-CCN |
| U0438-00 | IMPLAUSIBLE DATA RECEIVED FROM TRAILER CONTROL MODULE |
| U11FA-00 | LOST COMMUNICATION WITH RIGHT BLIND SPOT SENSOR |
| U1412-00 | IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED |
| U147D-00 | IMPLAUSIBLE DATA RECEIVED FROM RIGHT BLIND SPOT SENSOR |
Factory Service Tools
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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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