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.
2015 Lincoln MKX AWDFACTORY OEM SERVICE PROCEDURE
Headlamp Control Module (HCM)
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B1342 | ECU Is Faulted | INSTALL a new LH headlamp assembly. REFER to Headlamp Assembly . TEST the system for normal operation. |
| B2609 | ECU Output to Left Headlamp Stepper Motor Circuit Failure | GO to Pinpoint Test L . |
| B2612 | ECU Output to Right Headlamp Stepper Motor Circuit Failure | GO to Pinpoint Test L . |
| B100B | Left Headlamp Swivel Control Failure | GO to Pinpoint Test L . |
| B100C | Right Headlamp Swivel Control Failure | GO to Pinpoint Test L . |
| U0073 | Control Module Communication Bus A Off | REFER to Module Communications Network , Intermittent no High Speed Controller Area Network (HS-CAN) communication, one or more modules are not responding during network test. |
| U0100 | Lost Communication With ECM/PCM | GO to Pinpoint Test I . |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | GO to Pinpoint Test J . |
| U0140 | Lost Communication With Body Control Module (GEM) | GO to Pinpoint Test K . |
| U0415 | Invalid Data Received From Anti-Lock Brake System (ABS) Control Module | RETRIEVE and REPAIR all non-network DTCs set in the ABS module. REFER to Anti-Lock Brake System (ABS) and Stability Control . CLEAR the DTCs. REPEAT the self-test. |
| U2050 | No Application Present | CARRY OUT the Programmable Module Installation (PMI). REFER to Module Configuration . TEST the system for normal operation. |
| U2471 | Unexpected PRNDL State | RETRIEVE and REPAIR all non-network DTCs set in the PCM. REFER to Electronic Engine Controls . CLEAR the DTCs. REPEAT the self-test. |
| U2472 | Unexpected Ignition State | RETRIEVE and REPAIR all non-network DTCs set in the Body Control Module (BCM). REFER to Multifunction Electronic Modules . CLEAR the DTCs. REPEAT the self-test. |
| U2473 | Unexpected Vehicle Speed (VSS) | RETRIEVE and REPAIR all non-network DTCs set in the ABS module. REFER to Anti-Lock Brake System (ABS) and Stability Control . CLEAR the DTCs. REPEAT the self-test. |
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.