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Home >> Buick >> 1995 >> Park Avenue Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM/Pcm Code Charts >> Code P1558, Cruise System Problem SPS Indicated Low >> Circuit Description
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Circuit Description

PCM controlled cruise control system is designed to be self-monitored to ensure desired cruise servo position and actual cruise servo position are equal to one another. PCM will set Code P1558 when actual servo position is too low when maximum servo is commanded.