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Home >> Ford >> 1995 >> Contour V6-153 2.5L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> H - Fuel Control >> H48 - Check Continuity Of Power Ground in HO2S Connector
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H48 - Check Continuity Of Power Ground in HO2S Connector

- Key "OFF".

- Heated Oxygen Sensor(s) (HO2S) disconnected.

- Measure the resistance between the power ground test pins at the HO2S harness connectors and battery (-).

- Is the resistance less than 5.0 ohms?

Yes -- Replace HO2S heater relay. Reconnect all components. If symptoms still exists, return to Diagnosis by Symptom (Diagnostic Routines).

No -- Service open in PWR GND. Reconnect all components. Do not rerun Quick Test.
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