Operation CHARM
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Mercury
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1986
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Marquis L4-140 2.3L VIN A 1-bbl
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Repair and Diagnosis
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Sensors and Switches
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Sensors and Switches - Powertrain Management
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Sensors and Switches - Computers and Control Systems
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Oxygen Sensor
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Locations
Oxygen Sensor: Locations
Rear right side of engine in manifold