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.
2010 Mercury Mariner 2WD V6-3.0LFACTORY OEM SERVICE PROCEDURE
Test H: Fuel Control
PINPOINT TEST H: FUEL CONTROL
Warning:
Heated Oxygen Sensor-Front (HO2S-Front) Connector:
Heated Oxygen Sensor-Front (HO2S-Front) Connector And Heated Oxygen Sensor-Rear (HO2S-Rear) Connector:
Heated Oxygen Sensor-Rear (HO2S-Rear) Connector And Universal HO2S-Front Connector:
Universal HO2S-Front Connector And Powertrain Control Module (PCM) Connector:
Powertrain Control Module (PCM) Connector:
Powertrain Control Module (PCM) Connector:
H1-H3:
H4:
H5-H6:
H7-H9:
H10-H14:
H15-H16:
H17-H18:
H19-H20:
H21:
H22:
H23-H25:
H26-H28:
H29-H31:
H32-H34:
H35-H37:
H38-H40:
H41-H43:
H44-H45:
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.
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