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.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONDTC INDEXCLIMATE CONTROL SYSTEM DTCS
2009 Mercury Milan Premier, 3.0 1, AWD
Climate Control System DTCS
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Climate Control System DTCS
HVAC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1003 | Mode Door Circuit Failure | Go to Pinpoint Test F . |
| B1251 | Air Temperature Internal Sensor Circuit Open | Go to Pinpoint Test D . |
| B1253 | Air Temperature Internal Sensor Circuit Short To Ground | Go to Pinpoint Test D . |
| B1255 | Air Temperature External Sensor Circuit Open | Go to Pinpoint Test E . |
| B1257 | Air Temperature External Sensor Circuit Short To Ground | Go to Pinpoint Test E . |
| B1676 | Battery Voltage Out of Range | Go to Pinpoint Test J . |
| B2266 | Left Side Blend Door Circuit Failure | Go to Pinpoint Test Q . |
| B2267 | Right Side Blend Door Circuit Failure | Go to Pinpoint Test Q . |
| B2426 | Passenger Solar Radiation Sensor Circuit Open | Go to Pinpoint Test F . |
| B2427 | Passenger Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test F . |
| B2795 | Driver Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test F . |
| B2796 | Driver Solar Radiation Sensor Circuit Open | Go to Pinpoint Test F . |
| B2826 | Front Evaporator Temp Sensor Circuit Failure | Go to Pinpoint Test G . |
| B2827 | Front Evaporator Temp Sensor Short to Ground | Go to Pinpoint Test G . |
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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.