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)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - PINPOINT TEST DZ: UNIVERSAL HEATED OXYGEN SENSOR (HO2S) THROUGH PINPOINT TEST HG: POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM - (EXCEPT DIESEL & HYBRID)
2009 Mercury Milan Premier, 3.0 1, AWD
Engine Controls - Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S) Through Pinpoint Test Hg: Positive Crankcase Ventilation (PCV) System - (Except Diesel & Hybrid)
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Engine Controls - Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S) Through Pinpoint Test Hg: Positive Crankcase Ventilation (PCV) System - (Except Diesel & Hybrid)
- Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S)
- Pinpoint Test Em: Emission Compliance
- Pinpoint Test FB: Power Take Off (PTO)
- Pinpoint Test FD: Brake Pedal Inputs
- Pinpoint Test Ff: Power Steering Pressure (PSP) Switch
- Pinpoint Test H: Fuel Control
- Pinpoint Test HC: Fuel Delivery System
- Pinpoint Test Hd: Misfire Detection Monitor
- Pinpoint Test He: Exhaust Gas RECIRCULATION (EGR) Systems
- Pinpoint Test Hf: Catalyst Efficiency Monitor And Exhaust Systems
- Pinpoint Test Hg: Positive Crankcase Ventilation (PCV) System
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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.