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P0508 Diagnostic Trouble Code Discussion for April 2004

Idle Air Control Motor Sense Circuit Low


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Trouble Ticket Help Requests for DTC P0508
Help Request Posted
1999 Honda Accord EX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCG2522X
P0508: map signal high. Engine idles at 2000 rpm and surges badly. Computer is killing injectors to keep idle down. po505, idle control malfunction. I suspect failed IAC valve but was unable to remove it for inspection, due to high oxidation on the screws. As it was Saturday and didn...
April 17, 2004