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Home >> Cadillac >> 1994 >> DeVille Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.9L >> Pcm Code Charts >> Code P027, Open Throttle Position Switch Signal >> Test Conditions
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Test Conditions

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 engine speed at least 64 RPM greater than desired. At least 4 seconds have passed between brake applications or the last ISC motor pulse from PCM.

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