code p1209&p1211 - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 12 (permalink) Old 11-07-2014, 08:28 PM Thread Starter
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code p1209&p1211

hey there everybody I got 01 f-550 engine light comes on when on strain going up little or reg hill . still has plenty power but come to stop light sometimes it just dies and then no start and then sometimes it starts hard but starts when idling light go off.when cold starts when hot sometimes hard start sometimes not please help do not know much about diseal trying to learn thank you:
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post #2 of 12 (permalink) Old 11-08-2014, 11:24 PM
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I responded in the other thread you posted in, and I'm copying and pasting that info here with the code info.

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Originally Posted by imported_BigGreen View Post
P1209 Injection Control System Pressure Peak Fault

P1211 ICP Not Controllable - Pressure Abow/Below Desired
These are not fuel pressure related. There is no pressure sensor on the fuel system on a 7.3 to measure fuel pressure and generate these codes.

They are high pressure oil system related. Just as described in the old posts in the other thread you found with the search function. And like in those posts, we need a bit more info. Are you chipped? How many miles? Stock/original injectors? Stock/original IPR and HPOP?

F-550s have hard lives, they are usually loaded down or towing all te time, and they are geared so that on the highway they are turning 2700rpm at 70 in overdrive. The long term high rpm use under heavy loads is like an F-250 or F-350 running 2x-4x as many miles as your odometer shows. If the truck has never had injectors or major HPO system repairs or service, these items are likely worn out, with the injectors needing more oil than fresh stock parts and the HPOP and IPR underperforming and failing to supply adequate oil volume resulting in your low pressure codes.



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The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4

6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
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6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift
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post #3 of 12 (permalink) Old 11-09-2014, 05:26 PM Thread Starter
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thanks reply on 01 f-550 7.3 powerstroke I don't know if it has a chip but I replaced HPOP,IPR VALVE NOT REBUILD WHOLE NEW IPR.ALL INJECTORS,ICP,PLUG ON ICP,SENSOR IN BACK OIL RESORVIOR,HIGH PRESS FUEL PUMP,SENDING UNIT IN TANK,AND TRUCK HAS 232546 MILAGE USE IT FOR TOWING ,FLATBED
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post #4 of 12 (permalink) Old 11-09-2014, 09:50 PM
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I'm going to keep to answering just one thread.

I would do a simple test and put a gauge on the truck to check the actual oil pressure on the low pressure system. It sounds like you may have a tired LPOP, and that would hurt supply to the HPOP when the engine is hot.

Just because the oil pressure light isn't on or the gauge shows pressure doesn't mean that it's really enough pressure. The gauge and light are actually run off a switch, not a sender, and the oil pressure switch turns the light off and makes the gauge register pressure at anything over 5psi.


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The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4

6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4

6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift
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post #5 of 12 (permalink) Old 11-10-2014, 02:05 AM Thread Starter
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I will try that to see what happens I really appreciate your help thank you will let you know what happens i
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post #6 of 12 (permalink) Old 11-10-2014, 03:38 AM Thread Starter
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How do you check lpop pressure don't know where to check on this one
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post #7 of 12 (permalink) Old 11-10-2014, 01:54 PM
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The pressure switch for the gauge in in top of the HPOP reservoir. You can check the pressure there.


Sent by my right thumb!

The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4

6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4

6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift
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post #8 of 12 (permalink) Old 11-10-2014, 07:02 PM Thread Starter
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with gauge 45 psi cold start let idle for hour dropped down to 19psi cut motor off try restart not happen gauge had 8 psi cranking over started with starting fluid please help
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post #9 of 12 (permalink) Old 11-11-2014, 06:39 AM
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LPOP is not making enough pressure to feed the engine and the HPOP reservoir during cranking when hot. Remove the LPOP and inspect it for wear. There are clearances available to measure the pump and determine if it is go or no-go. The LPOP is directly behind the balancer on the front of the engine. New pumps are available from Melling, Ford, International and probably others, I've seen others recommend Melling for this application, I've used them for over 20 years. Be sure to check the front timing cover for excess wear too, If there are any grooves in the machined areas wear the pump gears move, the front cover will need replacement.

Again, these are F-450/550 problems because of lots of highway rpm meaning more cycles on the parts in the same miles as a F-250/350. Just by gearing alone, a truck with 4.88 gears will turn the crankshaft 31% more than a 3.73 truck. A truck with 5.13 gears it's 38% more. If a 7.3 spent 100,000miles in overdrive with a 3.73 gear and a 32" tire it would turn 29,000,000 revolutions, 235k is about 68.2 MILLION revolutions, not counting all the time spent in 1st, 2nd, and 3rd gears where the engine turns far more revolutions per mile, likely enough that a 235k mile 7.3 F-250/350 with 3.73 gears has probably spun the crankshaft close to 90 million times in it's bearings. That means an F-450/550 with 4.88 gears will have closer to 120 Million cycles on the engine. Make sense that the oil pump can wear out?

On the same note, F450/550 trucks with 4.88/5.13 gears should have their oil changed on lower mileage and hours schedules than 3.55/3.73/4.10 geared trucks.


Sent by my right thumb!

The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4

6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4

6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift
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post #10 of 12 (permalink) Old 11-16-2014, 01:10 AM Thread Starter
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Going to try that Sunday morning sur hope that's the problem tired of spending money and not being fixed local mech shop has not been able to do anything for me sorry about bothering you just need flatbed back on road so can make money up I put out
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