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P1661 Diagnostic Trouble Code Discussion for September 2009

MIL Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1661
Help Request Posted
1994 Ford F-350 XL 7.3L No Start, Poor Idle Quality VIN: 1FTHX26F5R
P1661: output circuit ck signal low. When cold this truck will start, early direct injected engine. then when you shut it off, it won't start. No icp (injector control pressure) showing, it does show .24 volt, but when you crank it, it won't go above .50 volt and the pressure readings is 125 psi,...
September 17, 2009