× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0509 Diagnostic Trouble Code Discussion for October 2012

Idle Air Control Motor Sense Circuit High

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0509
Help Request Posted
2001 Saturn SC2 1.9L Poor Idle Quality, Stall, MIL Lamp on VIN: 1G8ZY12761
P0509: IAC Valve Circuit High Input. This is a frustrating one. A few weeks ago the customer asked me to come to his house to get his car started. He had changed the EGR valve, EVAP purge valve, and Coolant Temp. Sensor. I cleaned the fouled plugs and got it started. It still didn't idle, but he ...
October 04, 2012