Marquis L4-140 2.3L VIN A 1-bbl (1986)
Oxygen Sensor: Description and Operation
Exhaust Gas Oxygen Sensor
The EGO Sensor supplies ECA with a signal which indicates either a rich or lean condition during engine operation.
Mercury Workshop Service and Repair Manuals
Exhaust Gas Oxygen Sensor|Page 2192 >
< EGO Sensors - Silicone Contamination|Page 2189
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