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Home >> Cadillac >> 1993 >> Seville STS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Pcm >> Pcm Code Charts >> Pcm Code P027 - Open Throttle Switch Signal >> Test Conditions
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Test Conditions

PCM Codes P021, P022 and P024 not set. Vehicle in coast down condition. Throttle switch open, brakes applied, throttle angle 16.5 degrees or less and RPM greater than desired. At least 6 seconds have passed between brake applications or the last ISC motor pulse from PCM.

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