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.
2007 Volvo V50 Base, 2.4 39FACTORY OEM SERVICE PROCEDURE
Headlight Control Module (HCM) DTCS
HEADLIGHT CONTROL MODULE (HCM) - DTC INDEX
| DTC | Description |
| HCM-0142 | Control Module. Internal Fault |
| HCM-0142 | Control Module. Internal Fault (B5254T7) |
| HCM-2281 | Control Module. Communication Fault |
| HCM-2281 | Control Module. Communication Fault (B5254T7) |
| HCM-2283 | Control Module. Communication Fault |
| HCM-2283 | Control Module. Communication Fault (B5254T7) |
| HCM-2285 | Control Module. Incorrect Software |
| HCM-2285 | Control Module. Incorrect Software (B5254T7) |
| HCM-2287 | Control Module. Communication Fault |
| HCM-2287 | Control Module. Communication Fault (B5254T7) |
| HCM-2289 | Control Module. Communication Fault |
| HCM-2289 | Control Module. Communication Fault (B5254T7) |
| HCM-2291 | Control Module Faulty Signal |
| HCM-2291 | Control Module Faulty Signal (B5254T7) |
| HCM-2293 | Control Module. Communication Fault |
| HCM-2293 | Control Module. Communication Fault (B5254T7) |
| HCM-2295 | Control Module. Communication Fault |
| HCM-2295 | Control Module. Communication Fault (B5254T7) |
| HCM-2297 | Control Module. Communication Fault |
| HCM-2297 | Control Module. Communication Fault (B5254T7) |
| HCM-2687 | Control Module. Communication Fault |
| HCM-2687 | Control Module. Communication Fault (B5254T7) |
| HCM-2987 | Control Module. Communication Fault |
| HCM-2987 | Control Module. Communication Fault (B5254T7) |
| HCM-6401 | Left Headlamp Faulty Signal |
| HCM-6401 | Left Headlamp Faulty Signal (B5254T7) |
| HCM-6402 | Left Headlamp Faulty Signal |
| HCM-6402 | Left Headlamp Faulty Signal (B5254T7) |
| HCM-6403 | Left Headlamp Faulty Signal |
| HCM-6403 | Left Headlamp Faulty Signal (B5254T7) |
| HCM-6501 | Right Headlamp Faulty Signal |
| HCM-6501 | Right Headlamp Faulty Signal (B5254T7) |
| HCM-6502 | Right Headlamp Faulty Signal |
| HCM-6502 | Right Headlamp Faulty Signal (B5254T7) |
| HCM-6503 | Right Headlamp Faulty Signal |
| HCM-6503 | Right Headlamp Faulty Signal (B5254T7) |
| HCM-8F20 | Position Sensor Rear Signal Too High |
| HCM-8F20 | Position Sensor Rear Signal Too High (B5254T7) |
| HCM-8F21 | Position Sensor Rear Signal Too Low |
| HCM-8F21 | Position Sensor Rear Signal Too Low (B5254T7) |
| HCM-8F22 | Position Sensor, Calibration Not Completed |
| HCM-8F22 | Position Sensor, Calibration Not Completed (B5254T7) |
| HCM-8F30 | Position Sensor Front Signal Too High |
| HCM-8F30 | Position Sensor Front Signal Too High (B5254T7) |
| HCM-8F31 | Position Sensor Front Signal Too Low |
| HCM-8F31 | Position Sensor Front Signal Too Low (B5254T7) |
| HCM-8F40 | Power Supply Sensor Faulty Signal |
| HCM-8F40 | Power Supply Sensor Faulty Signal (B5254T7) |
| HCM-8F41 | Power Supply Sensor Faulty Signal |
| HCM-8F41 | Power Supply Sensor Faulty Signal (B5254T7) |
| HCM-DD00 | LIN Communication Fault |
| HCM-DD00 | LIN Communication Fault (B5254T7) |
| HCM-DD01 | LIN Communication Fault |
| HCM-DD01 | LIN Communication Fault (B5254T7) |
| HCM-DD02 | LIN Communication Fault |
| HCM-DD02 | LIN Communication Fault (B5254T7) |
| HCM-DD10 | LIN Communication Fault |
| HCM-DD10 | LIN Communication Fault (B5254T7) |
| HCM-DD11 | LIN Communication Fault |
| HCM-DD11 | LIN Communication Fault (B5254T7) |
| HCM-E000 | Control Module Communication Fault |
| HCM-E000 | Control Module Communication Fault (B5254T7) |
| HCM-E003 | Configuration Fault Faulty Configuration |
| HCM-E003 | Configuration Fault Faulty Configuration (B5254T7) |
| HCM-E010 | Control Module Voltage Too Low |
| HCM-E010 | Control Module Voltage Too Low (B5254T7) |
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.