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Home >> Ford >> 1990 >> Probe GL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.2L >> Key On Engine Running (KOER) Self-Test >> Test Procedure
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Test Procedure

1)  Deactivate Self-Test. Ensure vehicle is at normal operating temperature. Start engine and run at 2000 RPM for 2 minutes to ensure EGO sensor is operating.

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