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P1509 Diagnostic Trouble Code Discussion for August 2013

Idle Speed High - IAC System Not Responding

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Trouble Ticket Help Requests for DTC P1509
Help Request Posted
1998 Chevrolet C3500 Cheyenne 5.7L Poor Idle Quality VIN: 1GBJP32R2W
P1509: Idle Speed High - IAC System Not Responding. ... truck came in about a week back with a C E L lite on (p1509) the I A C was replaced .ran great about a week now it is back at the shop. with high idle around 2300 rpm can not control idle with scan tool I A C reads 0. T P S works fine the tech who checked ...
August 14, 2013