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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 659 (SPEED CONTROL)DIAGNOSIS AND TESTINGSPEED CONTROLPINPOINT TESTSPINPOINT TEST C: DTC P0579 OR DTC P0581 SPEED CONTROL SWITCH CIRCUIT FAILUREPOSSIBLE CAUSES
2009 Mercury Milan Premier, 3.0 1, AWD
Possible Causes
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Possible Causes
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- Circuit RES08 (GN/BN) open or short to voltage
- Circuit VES10 (WH) open, short to voltage or ground
- Clockspring
- Speed control switch
- PCM
RENDER: 1.0x
NO RELATED
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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.