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Home >> Mercury >> 1997 >> Grand Marquis V8-4.6L SOHC VIN 6 >> Repair and Diagnosis >> Sensors and Switches >> Sensors and Switches - Powertrain Management >> Sensors and Switches - Computers and Control Systems >> Oxygen Sensor >> Service Precautions

Oxygen Sensor: Service Precautions

When servicing exhaust system or removing exhaust components, disconnect all Heated Oxygen Sensors (HO2S) at the wiring connectors to prevent damage to the heated oxygen sensors and wiring harness.
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