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Old 03-15-2012, 12:22 PM   #1
2Ton71
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Question 7.3 and P1211 Code

With my recent upgrades (Precision Turbo drop in replacement, Edge Juice CTS, up-pipes, etc) I have been getting the P1211 DTC, for the injector control pressure too high or too low while towing.

Has anyone had issues with the code, and what were your fixes? I've read that if you have a tuner on your truck it will more than likely cause the code if you don't have any oil/fuel modifications. Should a newer high flow HPOP take care of this?

Just curious if anyone here has dealt with it and what the solution was. I don't want to throw a $600 HPOP on there and not fix the problem.
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Old 03-15-2012, 12:24 PM   #2
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Default Re: 7.3 and P1211 Code

Another thing, once this code is triggered do you think it drops fuel/power?
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Old 03-15-2012, 12:34 PM   #3
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Default Re: 7.3 and P1211 Code

Another thing, good oil, just changed the HPOP oil (i'll have to check the level again today, it could be low), truck starts and runs great it just levels out at 15-18psi in high gear under load with the trailer (75-80mph). I've monitored the ICP and it looks within tolerance of what everyone suggests.

Also added a boost fooler hoping it was just going into over boost, still threw the code.
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Old 03-15-2012, 01:16 PM   #4
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Default Re: 7.3 and P1211 Code

Mine was doing that code when it had an ICP sensor on its way out. What year truck?
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Old 03-15-2012, 04:05 PM   #5
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Default Re: 7.3 and P1211 Code

It's a 2000
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Old 03-16-2012, 07:14 PM   #6
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Default Re: 7.3 and P1211 Code

What are seeing for ICP? Does it ever stall? Check you connector on the ICP switch for oil, if it has some oil on it replace the switch and connector. Also compare ICP voltage vs pressure and see if its biased. I have probably replaced four ICP switches this year because they were leaking oil and one because it was biased.
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Old 03-18-2012, 10:23 PM   #7
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Default Re: 7.3 and P1211 Code

have you done injector orings? if they go you loose oil pressure to injectors. i would replace the first before doing pump unless they are less than 2 yrs old . Farly easy job to do,lots of info out there to do it. next I would replace the pressure regulator next.last resort pump
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Old 03-20-2012, 12:36 PM   #8
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Default Re: 7.3 and P1211 Code

Gets about 480-500psi at idle, and 2700-2800psi under load at 2100rpm/12psi/70mph. Never stalls, runs great. Just gets a bit of turbo surge under load with the throttle to the floor and 12-18lbs of boost. The new turbo shouldn't surge at all, so I'm wondering if the code is causing it to cut fuel or the pump can't keep up.

Truck has 231,000 miles, and I don't think it has ever had o-rings put on the injectors. I've had it for 6 years and 60,000 miles. Could be a good place to start. The truck does use a bit of oil, so some o-rings could be leaking.
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Old 03-20-2012, 06:07 PM   #9
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Default Re: 7.3 and P1211 Code

I'VE HAD THAT SAME THING GOING ON 2 YRS NOW .

I'VE CHANGED THE SENSOR IN VC ,THEN THE FUEL PUMP,THEN THE HIGH PRESURE REGULATOR AND IT STILL DOES IT .BUT MOSTLY WHEN TOWING ,THE MORE LOAD THE EASIER IT GOS ON .AND YES I BELIEVE IT CUTS OUT ON POWER WHEN IT HAPPENS .LMK WHEN YOU FIND THE PROBLEM .I'VE HAD MINE TO FORD AND OTHER TOP DIESEL GUYS .I JUST DON'T UNDERSTAND HOW ITS BEEN 30,000MILES AND 2 YRS AND STILL THE SAME ? MINE IS A 02
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Old 03-20-2012, 06:15 PM   #10
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Default Re: 7.3 and P1211 Code

Quote:
Originally Posted by 2Ton71 View Post
Another thing, good oil, just changed the HPOP oil (i'll have to check the level again today, it could be low), truck starts and runs great it just levels out at 15-18psi in high gear under load with the trailer (75-80mph). I've monitored the ICP and it looks within tolerance of what everyone suggests.

Also added a boost fooler hoping it was just going into over boost, still threw the code.
DAMN I WAS JUST ABOUT TO TRY THE BOOST FOOLER ALSO.GUESS NOT .HAS YOURS DONE IT SINCE YOU OWNED IT OR JUST START ALL OF A SUDDEN OR SINCE YOU PUT A BIGGER TURBO ON IT? I WAS TOLD IT COULD BE THE HIGH OR LOW PRESSURE PUMP ! YOU WOULD THINK THICKER OIL WOULD HELP WHEN IT THROWS THE LIGHT I CAN FEEL IT IN THE GAS PEDAL LIKE LEVEL OUT OR LOOSE BOOST OR SOMETHING WEIRD!.I HAD A GUY WITH ME WHO HAD A FORD MONITER ON IT AND HE SAID LOOKED LIKE HIGH PRESSURE JUMPED WHEN IT HAPPENED SO HE RECOMMENDED THE REGULATOR !NOW 200 LATER SAME ,SENSOR 200 MORE FUEL PUMP 200 MORE .DAMN ITS PISSIN ME OFF !!
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Old 03-20-2012, 08:07 PM   #11
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Default Re: 7.3 and P1211 Code

I know this is going to sound out of left field but bear with me.

2Ton71 and HEAVYHITR sound to have the same symptoms and HEAVYHITR has changed the IPR and ICP without luck.

I would suggest to both of you to start checking grounds. Everywhere. Pull up a schematic if you can as there are a bunch of ground points for the ECM/injection system on these trucks, including the body mounts.

It's a long read but this thread will clue you in on how important the grounds are on these trucks. It may even clue you in on a bunch of other things to check and how to check them. Once you get into the thread you'll see what I mean. It starts out with Charles kicking around the idea of upgrading his compounds but gets into his troubles with ICP later.

http://powerstrokenation.com/forums/...ad.php?t=91269

I can't reccommend that site for too much current knowledge though. Most of the guys in the know from that site have pretty much jumped ship. There is a good amount of info in old threads there though.
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Last edited by Blue Oval Guy; 03-20-2012 at 08:11 PM.
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Old 03-20-2012, 08:20 PM   #12
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Default Re: 7.3 and P1211 Code

Heavyhitter, I would suggest a boost fooler anyway if you have your truck turned up some. I never noticed the DTC until I put the new tuner and turbo on (both were installed at the same time) The turbo isn't much bigger than stock, just a drop in replacement similar to the GT38R.

Blue Oval, I agree with the message board comment about knowledge. It's more brand loyal b.s. "Sounds like surge to me, put a wicked wheel on it" "Fuck that, put an ATS housing" "Do both"

I figured I would ask on here because most on here have experience towing with the trucks, not throwing parts on them and hot rodding.
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Old 03-21-2012, 01:39 AM   #13
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Default Re: 7.3 and P1211 Code

do you also feel a power loss of somekind when the cel comes on ? I BET IF YOU TAKE THE TUNER OFF IT WON'T SET THE CODE .

LMK WHAT FIXES IT .THANKS.
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Old 03-21-2012, 12:21 PM   #14
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Default Re: 7.3 and P1211 Code

I haven't driven it enough with the trailer and the new turbo to know if it has lost power. I will keep you updated.
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Old 04-02-2012, 12:17 PM   #15
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Default Re: 7.3 and P1211 Code

Update on this...

Cleared the 1211 code before a trip with the trailer. Drove the truck on back roads and through some stop lights on the way to the interstate. No surge or code thrown. Hit the interstate and ran a test.

65mph in 6th gear at 2000rpm, 2000psi ICP, 5psi of boost, EGT 900 +/- degrees (tow mode hauling around 10,000lbs)
I eased into the throttle to wide open and monitored the boost and ICP. (also listened for surge)
The ICP spiked up to 2900psi from 5psi-13psi of boost, once it hit 14psi the ICP suddenly dropped down to 2000psi and stayed there. It threw the 1211 code and started the surge noise at that point. I got it up to 18psi and had to let off of it because I was doing 85mph with an enclosed trailer in tow..

Suggestions?

IPR going bad? ICP sensor?

Seems the surge noise and the P1211 code could be tied together?
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Last edited by 2Ton71; 04-02-2012 at 12:19 PM.
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