Questions & Answers for: Ford F-250 key idm

...Key On/Engine Off On-Demand Self Test. If the PCM is unable to obtain diagnostic information from the IDM, DTC 1668 is set. --------------------------------------------- Glow Plug Control Glow plugs ...

idm fail another easy thing to do is open the drain on the fuel filter bowl and turn the key on and crank for 1 sec is there fuel shooting out ? if there isnt check fuel pump well that about covers it

-- Open fuse -- IDM relay -- Open or shorted IDM enable circuit -- Open/short in EF circuit -- Open/short in FDCS circuit -- IDM powering circuits -- PCM l Check for other codes. l Key on, engine off

...bad wire, usually close to the plug. A cheap fix. Next I would check the IPC sensor. Ohm it out. An OL reading, replace it. Also check the plug for power and ground with key on. Next would be the