p1212 touble code - Ford Powerstroke Diesel Forum
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Old 05-09-2013, 01:17 PM
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p1212 touble code

Hello all is there anyone familiar with the p1212 code?? I've replace the crank sensor, fuel pump, ipr valve, and did the oil change on it, the truck is also idling like its cammed and when its col it starts up a lil slow but it fires up. but when its warmed up it cranks for a while before it starts. I would think its the oil pump trying to build presser to start it but im not all the way sure. the truck has 270,000 miles on it

Advice would be greatly appreciated
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Old 05-09-2013, 01:28 PM
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do you have a way to monitor icp pressure and ipr duty cycle?

did you check the wires going to the ipr valve?
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Old 05-09-2013, 04:22 PM
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Quote:
Originally Posted by JBRIXEN View Post
do you have a way to monitor icp pressure and ipr duty cycle?

did you check the wires going to the ipr valve?
no I don't
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Old 05-10-2013, 08:58 AM
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when its cold it starts and sounds like it should but the as it warms up it begins to lope
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Old 05-10-2013, 10:20 AM
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I just got off the phone with the ford dealer, they said its a high chance that its just the icp sensor so I have it ordered and is on the way and ill let you guys know how it makes out
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Old 05-10-2013, 11:33 AM
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Does it smooth out if you remove the harness from the ICP?
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Old 05-10-2013, 12:23 PM
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Quote:
Originally Posted by BigFuel View Post
Does it smooth out if you remove the harness from the ICP?
don't know, is that something I should try?
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Old 05-10-2013, 12:52 PM
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If you unplug the ICP while the engine is running rough the PCM will assume a standard value for the ICP and the engine should go from rough to smooth. If it does then yes it is _probably_ the ICP. Also look inside the ICP where the harness plug was, is there oil in it?
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Old 05-10-2013, 01:24 PM
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Quote:
Originally Posted by BigFuel View Post
If you unplug the ICP while the engine is running rough the PCM will assume a standard value for the ICP and the engine should go from rough to smooth. If it does then yes it is _probably_ the ICP. Also look inside the ICP where the harness plug was, is there oil in it?
ok i tried it, when it was cold it idled down rougher then picked it self up and ran smoother, but I took it around the my park idling and then i tried it again and it didn't do any difference once it got warm. i do have oil in the sensor but not in the electric plus that plugs into the sensor
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Old 05-10-2013, 01:37 PM
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I'm not convinced that this is a ICP issue. Without the ability to monitor the ICP, IPR % duty, and the HPO system in general I can be totally wrong here. Before you spend any more money on this lets do some testing.

My instinct here is that you have blown injector o-rings. When the engine is dead cold the oil is thicker (I know you know this already) and is harder to bypass the injector o-rings than it is as the oil heats up. The injector harness has four connection through the VC. With the engine running at operating temp and idling pull each connector and wait one minute. Did the idle change/roughen as the engine got used to not having those two injectors? If you pull one of the connectors and nothing happens (or barely nothing happens) lets go farther.
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