ICP problems?
Thread Starter
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Senior User
Joined: Jan 2003
Posts: 194
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From: East Hampton, NY
ICP problems?
Hey folks,
So here's my story, maybe someone can help educate me.
Before I continue, 01 F250, CC, auto, 37,000.
Service engine light came on last week, stayed on for about 5 minutes and went off. Noticed a slight change in the engine racket that was temporary. Went by the dealer and had it scanned. Came up with a 1211 fault, which is the ICP. Ran some test and all seemed well. Put on about 700 miles over the weekend with no fanfare.
Driving along last night and the engine made a funny noise again, and the service engine light came on, and then went out again promptly. Its at the dealer this morning. I am about positive its the ICP again.
So what could be happening? If I understand correctly, the ICP regulates the pressure in the high pressure oil rails, which fires the injectors. OK, so if the pressure got too low (or too high?), I imagine it would store an error code. Could the pump for the oil rails be the problem? What else could be wrong?
Just looking for some knowledge for when I go back to the dealer.
Thanks for any help.
-Shawn
So here's my story, maybe someone can help educate me.
Before I continue, 01 F250, CC, auto, 37,000.
Service engine light came on last week, stayed on for about 5 minutes and went off. Noticed a slight change in the engine racket that was temporary. Went by the dealer and had it scanned. Came up with a 1211 fault, which is the ICP. Ran some test and all seemed well. Put on about 700 miles over the weekend with no fanfare.
Driving along last night and the engine made a funny noise again, and the service engine light came on, and then went out again promptly. Its at the dealer this morning. I am about positive its the ICP again.
So what could be happening? If I understand correctly, the ICP regulates the pressure in the high pressure oil rails, which fires the injectors. OK, so if the pressure got too low (or too high?), I imagine it would store an error code. Could the pump for the oil rails be the problem? What else could be wrong?
Just looking for some knowledge for when I go back to the dealer.
Thanks for any help.
-Shawn
Elder User
Joined: Feb 2002
Posts: 755
Likes: 1
From: Campbell, California
ICP problems?
ICP is a known problem at least on the 6.0L, not sure about the 7.3L. Read up on the Oasis reports. Seems that some of the replacement ICP are turning up bad too. The correct procedure for replacing them is to read the voltage of the original sensor, if it's out of range then plug a new one in and reads it voltage before installing it.
Good luck.
Good luck.
Last edited by hitecdan; Mar 19, 2003 at 09:07 AM.
Thread Starter
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Senior User
Joined: Jan 2003
Posts: 194
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From: East Hampton, NY
ICP problems?
Thanks hitecdan.
Did a little more research.
1211 fault is something with the ICP, or IPR. If set (the fault) during normal engine operation (it was), it indicates the ICP is operating in open loop mode and the ICP is above or below the desired pressure.
It could also record that fault if the IPR valve failed, is stuck or shortened to ground.
Cheers,
Shawn
Did a little more research.
1211 fault is something with the ICP, or IPR. If set (the fault) during normal engine operation (it was), it indicates the ICP is operating in open loop mode and the ICP is above or below the desired pressure.
It could also record that fault if the IPR valve failed, is stuck or shortened to ground.
Cheers,
Shawn
Posting Guru
Joined: Feb 2001
Posts: 1,465
Likes: 2
From: Indianapolis
ICP problems?
The ICP measures how much rail pressure you've got, sends that information to the ECM and the ECM decides how much pressure you need, based on engine speed, load and other inputs, then tells the IPR to adjust it accordingly. I am not familiar with Ford's codes but there are several codes that are related to, or labeled ICP codes. Your ECM may have detected a PSI pressure that was outside the programed parameters which either means the pressure was too high or too low in which case it has to be determined if the pressure is bonifide, in which case the IPR is at fault for not providing the pressure demanded by the ECM, or bogus, in which case the ICP is at fault. Since it is a relativly easy procedure to change the ICP, I'd try that first (it is also less expensive). If that doesn't solve the problem, you probably have a lazy or sticking IPR valve.
When your check engine light came on your computer went into open loop ("limp home mode") which is why the tone of the engine changed.
When your check engine light came on your computer went into open loop ("limp home mode") which is why the tone of the engine changed.
Thread Starter
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Senior User
Joined: Jan 2003
Posts: 194
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From: East Hampton, NY
ICP problems?
Thanks Joe!
As always, you put it into words for the layman. Acid test for that...I understand what you describe! Now we see what the dealer has to say.
Thanks again,
-Shawn
As always, you put it into words for the layman. Acid test for that...I understand what you describe! Now we see what the dealer has to say.
Thanks again,
-Shawn
Thread Starter
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Senior User
Joined: Jan 2003
Posts: 194
Likes: 0
From: East Hampton, NY
ICP problems?
Went by the dealer after work to find out the prognosis. Service dept. was closed by the time I got there, but the owner of the shop called the mechanic at home to find out what was up.
Mechanic said it was fixed, they replaced the ICP. Mr. Plitt gave me my keys and the work order and I was gone. Hopefully that was the problem.
I must comment about my dealer. Maybe it because they are such a small outfit, but they are so personable and accomodating. Where else is el jefe gonna call the mechanic at home for you? Mechanic was prolly pissed though!
Thanks for the help,
Shawn
Mechanic said it was fixed, they replaced the ICP. Mr. Plitt gave me my keys and the work order and I was gone. Hopefully that was the problem.
I must comment about my dealer. Maybe it because they are such a small outfit, but they are so personable and accomodating. Where else is el jefe gonna call the mechanic at home for you? Mechanic was prolly pissed though!
Thanks for the help,
Shawn
