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, Active Noise Cancellation (ANC)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B143B-11 | ANC MICROPHONE 1-CIRCUIT SHORT TO GROUND |
| B143B-12 | ANC MICROPHONE 1-CIRCUIT SHORT TO BATTERY |
| B143B-13 | ANC MICROPHONE 1-CIRCUIT OPEN |
| B143B-2B | ANC MICROPHONE 1-WIRES SHORTED TOGETHER |
| B143C-11 | ANC MICROPHONE 2-CIRCUIT SHORT TO GROUND |
| B143C-12 | ANC MICROPHONE 2-CIRCUIT SHORT TO BATTERY |
| B143C-13 | ANC MICROPHONE 2-CIRCUIT OPEN |
| B143C-2B | ANC MICROPHONE 2-WIRES SHORTED TOGETHER |
| B143E-11 | ANC MICROPHONE 3-CIRCUIT SHORT TO GROUND |
| B143E-12 | ANC MICROPHONE 3-CIRCUIT SHORT TO BATTERY |
| B143E-13 | ANC MICROPHONE 3-CIRCUIT OPEN |
| B143E-2B | ANC MICROPHONE 3-WIRES SHORTED TOGETHER |
| B143F-11 | ANC MICROPHONE 4-CIRCUIT SHORT TO GROUND |
| B143F-12 | ANC MICROPHONE 4-CIRCUIT SHORT TO BATTERY |
| B143F-13 | ANC MICROPHONE 4-CIRCUIT OPEN |
| B143F-2B | ANC MICROPHONE 4-WIRES SHORTED TOGETHER |
| B1460-11 | CHANNEL 1 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND |
| B1460-12 | CHANNEL 1 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY |
| B1460-13 | CHANNEL 1 AUDIO SPEAKER OUTPUT-CIRCUIT OPEN |
| B1460-92 | CHANNEL 1 AUDIO SPEAKER OUTPUT-PERFORMANCE OR INCORRECT OPERATION |
| B1464-00 | CHANNEL 1 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER |
| B1465-11 | CHANNEL 2 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND |
| B1465-12 | CHANNEL 2 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY |
| B1465-13 | CHANNEL 2 AUDIO SPEAKER OUTPUT-CIRCUIT OPEN |
| B1465-92 | CHANNEL 2 AUDIO SPEAKER OUTPUT-PERFORMANCE OR INCORRECT OPERATION |
| B1469-00 | CHANNEL 2 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER |
| B146A-11 | CHANNEL 3 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND |
| B146A-12 | CHANNEL 3 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY |
| B146A-13 | CHANNEL 3 AUDIO SPEAKER OUTPUT-CIRCUIT OPEN |
| B146A-92 | CHANNEL 3 AUDIO SPEAKER OUTPUT-PERFORMANCE OR INCORRECT OPERATION |
| B146E-00 | CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER |
| B146F-11 | CHANNEL 4 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO GROUND |
| B146F-12 | CHANNEL 4 AUDIO SPEAKER OUTPUT-CIRCUIT SHORT TO BATTERY |
| B146F-13 | CHANNEL 4 AUDIO SPEAKER OUTPUT-CIRCUIT OPEN |
| B146F-92 | CHANNEL 4 AUDIO SPEAKER OUTPUT-PERFORMANCE OR INCORRECT OPERATION |
| B1473-00 | CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER |
| B154F-00 | LOST CRANKSHAFT PULSE SIGNAL |
| 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 |
| B2201-00 | CALIBRATION MISMATCH |
| B222C-00 | VEHICLE CONFIGURATION NOT PROGRAMMED |
| B223B-00 | VEHICLE CONFIGURATION MISMATCH |
| B22A9-00 | ECU INTERNAL PERFORMANCE |
| U0010-00 | CAN INTERIOR BUS |
| U0011-00 | CAN INTERIOR BUS OFF PERFORMANCE |
| U0140-00 | LOST COMMUNICATION WITH BODY CONTROL MODULE |
| U0184-00 | LOST COMMUNICATION WITH RADIO |
| U0199-00 | LOST COMMUNICATION WITH DRIVER DOOR MODULE |
| U0200-00 | LOST COMMUNICATION WITH PASSENGER DOOR MODULE |
| U0201-00 | LOST COMMUNICATION WITH LEFT REAR DOOR MODULE |
| U0202-00 | LOST COMMUNICATION WITH RIGHT REAR DOOR MODULE |
| U0422-00 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE |
| U0485-00 | IMPLAUSIBLE DATA RECEIVED FROM RADIO |
| U049A-00 | IMPLAUSIBLE DATA RECEIVED FROM DRIVER DOOR MODULE |
| U0501-00 | IMPLAUSIBLE DATA RECEIVED FROM PASSENGER DOOR MODULE |
| U0506-00 | IMPLAUSIBLE DATA RECEIVED FROM LEFT REAR DOOR MODULE |
| U050C-00 | IMPLAUSIBLE DATA RECEIVED FROM RIGHT REAR DOOR MODULE |
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.