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Short in heated O2 sensor circuit. 12.4 volts to the sensor. key off, ECM unplugged.

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starts, runs, no power. No shorts until this occured, no kills battery overnight.

Vehicle: 2000 Ford Escort SE - 2.0 L

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The whole 02 harness up to the ECM may need to be replaced, Try a new 02 sensor that is in question.

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