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Home >> Ford >> 1990 >> Festiva L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Key On Engine Running (KOER) Self-Test >> Performing Test
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Performing Test

1)  Deactivate self-test. Start and run engine at 2000 RPM for 2 minutes to warm up EGO sensor. Turn engine off and wait 10 seconds.

2)  Restart engine and activate self-test. Record all service codes displayed. See SERVICE CODE REFERENCE  . If no codes are present, proceed to SWITCH MONITOR TEST.

NOTE: It is necessary to clear codes in memory before performing this test. DO NOT depress throttle during test.
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