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Home >> Buick >> 1995 >> LeSabre Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> ECM/Pcm Code Charts >> DTC 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.

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