Ford F-150 - 1997-2003 :: Getting Code P1299 With Plenty Of Coolant
Apr 10, 2012
I'm getting a p1299 code..it has plenty of coolant in it..what's the next step I should do to address the problem?
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Apr 10, 2012
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Ford F-150 (2004-2008) :: P1299 Code - Won't Start - Turn Over But Not Firing?
Just went out to start the truck (2006 4.2L) and no start...turns over but isn't firing.
I checked codes and got a P1299. She was stone cold and ran perfectly last night - never overheated.
I suspect ground or other wiring...where should I start?
Ford Excursion :: 2001 - Code P1299 - Cylinder Head Overtemp Protection Active
2001 EX 4WD 6.8l ... Just finished an engine rebuild and have a single DTC showing that I am having a problem isolating. In short: P1299 Cylinder Head Overtemp Protection Active. I have new sensors all around however. I have run a separate ground to the intake manifold to rule out bad ground. I have cleaned all ground connections otherwise. After clearing codes and start from cold, the issue does not occur until the engine warms up. I was seeing temps over 250 F on my scantool.
I pulled the thermostat and ran from cold... took a lot longer, but the condition eventually occurred. Scantool shows temp of 255.2 when protection kicked in. However, the engine, radiator, intake manifold all just slightly warm to the touch, barely no heat coming through the HVAC system. So, I do believe I had a new bad thermostat in the mix, but why do I still throw a code for the high temp. Temp gauge sits at Cold the whole time. Here's the catch, if I disconnect only the air coolant temp sensor, the problem does not occur, the engine runs like a kitten.
Key On, Engine off, the coolant temp gauge goes right to Hot and stays there. When the problem first started, the coolant temp gauge started going back and forth between Cold and Hot repeatedly. I have replaced that particular sensor twice to rule out a new bad sensor. Key on, engine off; with new sensor reads 185 ECT temp. Original sensor read 318, first replacement read 257. This third sensor is the only one that actually registers changing temperatures.
Ford Super Duty (1999-2016) :: Engine Temp Gauge Pegged Out And CEL Came On - P1299 Code
My truck threw a code p1299 last night on my way home from the lake. I was towing on a huge grade and all the sudden my engine temp gauge pegged out on me and check engine light came on. I pulled over and noticed a bunch of coolant had overflown the cap but the engine didn't seem to have over heated. When I restarted the truck the engine temp was immediately normal range. I drove for another 30 min or so and the engine temp started to climb and then come back to normal then climb and stay pegged. I pulled over again and noticed the coolant level was low and coolant had overflown the reservoir. I restarted the truck and once again it was normal. I just drove surface streets the rest of the way with no issue. I suspect blown head gasket. This is a 2003 F-250 6.8L with 100000 miles.
View 8 RepliesFord Super Duty (1999-2016) :: 2005 F250 - CEL Code P1299 For Cylinder Head Temperature Sensor
(The truck is a 05 f250 with a 5.4l). The problem first started out with the engine temperature gauge spiking and then resetting itself when the truck is turned off and then turned back on. If I drove the truck for any distance it would go into limp mode and the CEL would come on. The code was p1299, which is the cylinder head temperature sensor, and I replaced the sensor but no luck. Then the shop and I went through all accessories hooked up and couldn't find a short until I remembered that my prodigy break controller would occasionally read "ol" or "sh" which both readings are from shorts. I tow a enclosed trailer about 85% of the time and the past week I have been towing it with a different 250 and the same break controller without a problem so I have eliminated the trailer. But the shop just said the problem was the controller and unhooked it.
Now the next day it threw the same code with the controller unhooked and the trailer hooked up. after thinking it seemed that it was happening when i accelerated so I took apart the 7 pin and sure enough there was a little water in it, but after driving it around for a little and no code being thrown I hooked my break controller up and it still was showing ol or sh so i believe there is still a short. Also I noticed that my voltage is reading right at 13v instead of the 13.8-14v it was reading before this issue arose. I think I have narrowed it down to the 7 pin harness and/or electrical in the break components, but do not know what would loop back to the temperature sensor.
Ford 7.3L Power Stroke (1999-2003) :: Truck Wouldn't Go Fast / Plenty Of Power In Low End
2002 f250 7.3l diesel...
I got a new radiator and the tranny fluid was the worst the mechanic had ever seen. He serviced it and warned me that it might not be long for this world. I broke my flexplate and so I had to pull the tranny, and I decided to throw a new torque converter in because it was giving g me symptoms like a broken sprag( it wouldn't rev up or do a brake stand in gear, therefore slow takeoffs).
I was recommended to replace the tranny, I decided I could do the job again down the road if I needed to. About two thousand miles down the road I had a hard shift going from overdrive down to get up a hill and about 10 miles later the truck started slowing down....I couldn't give it enough pedal to keep it going and the engine sounded rough.
I pulled over and checked fluids and everything was fine, truck idled fine, bright red tranny fluid not burnt at all. Pulled on to the road again and it pulled fine until about 40 mph and it wouldn't go any faster. I got it towed home and ordered up a tranny from Ford figuring it must be toast, but I thought I'd throw it out to the forum to see if there is any other troubleshooting I can do before I install the new one in case it is some other problem or some electrical harness or something, or if that is a pretty standard reaction to a fried tranny.
Engine runs good at idle, shifts perfectly to drive and reverse, drives forward and back(I'm very hesitant to drive it out of the driveway in case I can't get it back in). Only happened two times before I decided to tow it. Temps looked fine on the gauges, fluid was a little overfilled in the tranny, but again, not hot or burnt.
Ford F-150 - 1997-2003 :: Coolant In Oil Pan
I discovered coolant in my oil pan on my 97 f150 4.2. Im replacing my intake manifold gasket which had coolant on the bolts and the timing cover gasket. Should I do the head gasket while its tore down that far?
View 1 RepliesFord F-150 - 1997-2003 :: Engine Oil In Coolant?
97 f150 4x4 4.6L V8 196XXX miles
So last oil change I noticed I was missing two quarts of oil over a 3 month period and It doesn't burn very much if any at all. Well I started snooping around and noticed my coolant smelled like exhaust... So I took it to a mechanic for a coolant flush and to try a quick fix in a bottle before I rip everything apart. First he did a chem test and he said it the color only changed a little bit so the leak wasn't huge yet. Well he pulled out quarts of oil in the cooling system and filled it back up with the gasket sealer, ran it hot like he should have, and drove it for 4 or so miles, said it seemed everything seemed good. Also had him throw in a new thermostat. Drove it home less than 2 miles and coolant is overflowing from the coolant reservoir on to my driveway
Ok now before I took it in it never gave me any problems. I had hoooot heat, never overheated and exhaust never seemed abnormal. So after I got it back from the mechanic I threw the front end on jack stands and tried burping hoping it was just air bubbles. Got a lot out but there always seems to be more. Couple days after that it puked coolant again but it still never overheats. The hot air never gets as hot as it used to, and usually the hot air gets colder and colder at idle and heats up when I start moving again (during this the temp gauge does not change noticeably). One time however as I was driving at a constant speed the air got colder and colder and the temp gauge started heading to cold even though it was completely warm a moment before. Shortly after I arrived at my destination and it was leaking coolant again but I didn't keep driving to find out what was going to happen next.
Burped it again. Now no matter what I do though I can't seem to get the top coolant tube to get hot like it should be when the engine is warm even though I was able to the first time. So I'm pretty sure my head gasket is toast but what I don't understand is what made it get so bad so suddenly, especially when I was trying to take preventative measures. And how is it that the oil is going into the coolant, I was under the impression it happens the other way around.
I understand that at this point I need a new engine or head gasket but I just don't get what went so wrong. Now I'm weighing my options of selling as is, replacing head gasket, or junkyard engine with low miles considering I have 196XXX on my current one.
Ford F-150 - 1997-2003 :: 1999 4.6L - Coolant Mixing With Oil
My son and I just rebuilt a '99 4.6L motor. A complete overhaul.
After running the motor for 15-25 minutes, I removed the oil filter and discovered a milky substance as I emptied it. I emptied the oil pan and found more water in the oil.
We removed the oil pan and did a coolant system pressure test, but didn't see any coolant coming from the bottom of the engine.
Is there anywhere other than the head gaskets where the 2 can mix or is this a normal occurrence during the break in period? The truck has not been driven anywhere yet.
I did not replace the head bolts with brand new. They were torqued properly tho.
Ford F-150 - 1997-2003 :: V8 Started Overheating - Oil In Coolant
I have a 2003 F150 4.6l triton v8.... I started over heating yesterday. Got home, let it cool down and found Oil in Coolant. No coolant in oil or transmission fluid. What could be wrong?
View 2 RepliesFord F-150 - 1997-2003 :: Coolant Leak At Manifold
My 2003 f150 4x4 w/5.4 has 220k miles and only minor issues until a few days ago. I now have a coolant leak at the mating surface (both sides left and right) of the aluminum crossover coolant manifold (holds thermostat on one end). I have most of the bolts out to remove the crossover manifold but there is one bolt on the RH side that comes from the underside. All things equal, main question is... Can that crossover mainfold be removed independently from the intake? My thought is that in order to get to that last single bolt (there may be others I am not aware of yet) that I will need to remove the intake.
View 1 RepliesFord F-150 - 1997-2003 :: Loosing Coolant Into Cylinder 1
Ok 210k truck runs great except I am loosing coolant into #1 cyl. Ive owned the truck since 120k and it has NEVER ran hot not even above normal. I guess due to expansion it will even fill up the cyl nearly hydro locking it, no oil in water/radiator and no water residue in the oil either. I had the intake gaskets replaced thinking it may have been it but it came soon back. I really dont think its an head gasket, has there ever been reported problems with the intakes on these trucks? oh btw 97 2wd with 4.6. Even with coolant getting into the cyl it still runs great just a little white smoke.... I really don't want to replace the engine I think it has a lot of life still in it.
View 5 RepliesFord F-150 - 1997-2003 :: V8 Started Overheating - Oil In Coolant
I have a 2003 F150 4.6 Triton V8.... My truck started over heating again after replacing the Thermostat and Water Pump later this summer.... Well I checked Coolant and I have Oil in the Coolant. I see Nothing wrong with the Tranny Fluid and see nothing wrong with the Oil.... What could be the problem??????
View 4 RepliesFord F-150 - 1997-2003 :: Leak Where The Coolant Leaves The Head
I have a 2001 F-150 5.4 engine. There is a coolant leak where the coolant leaves the head. Looks like a new gasket is in order. The part that needs to come off crosses over to the driver's side and the thermostat mounts into it. To remove this part and replace the gasket, it appears that most of the top of the engine, throtle body, fuel rails, intake, etc., will have to come off. One of the four bolts holding the part on is installed with the bolt head facing down. The only way I see to get this out is to take everything apart.
View 5 RepliesFord F-150 - 1997-2003 :: Tick Or Slight Knock - Coolant Low?
I have a 2000 F-150 xlt off road with a 5.4. I have owned the truck since 2001. The truck has 170K miles on it and I change the oil between 3-4K miles. The last couple oil changes I have I have noticed I haven't been draining as much out as I usually do, this past oil change was about 3 quarts low. I thought it was very odd. The truck runs great and does not smoke or leak oil.
This morning I got in and noticed a tick or slight knock, thought maybe it needed warmed up. After a minute. I shut it off and checked the oil, to my surprise there was next to no in the engine! This has me very worried now. I haven't checked my coolant since last oil change so I'm not sure if that's where it's going. Where to start looking, I'm missing like 5 quarts of oil in 3300 miles. Again the truck run great and does not smoke at all. I was getting ready to change it this weekend, always run high millage 5w-30.
Ford F-150 - 1997-2003 :: 2002 - Coolant Leak When Shut Off?
My '02 F150 180k X-cab with the 5.4L is leaking coolant when it is shut off. Its just pouring right out.It looks like it's coming from top of the trans and around the firewall area. I had to replace a drain plug already.. the one behind starter ..its not leaking.
View 4 RepliesFord F-150 - 1997-2003 :: 1999 - Coolant Leak Behind Engine?
My truck is leaking behind the engine. There is not any coolant on top of the engine. It's leaking above the transmission and running down the passage sides. Are there any hoses that could be leaking behind. Sometimes it leaks a lot other times it doesn't leak at all. The shop thinks it's a freeze plug but wouldn't it be leaking more if it was?
View 6 RepliesFord F-150 - 1997-2003 :: No Coolant Will Come Out The Water Outlet Pipe
I replaced water pump and thermostat...thermostat 2 times.
This is the thing : No coolant will come out the water outlet pipe.... I sit there for way too long and nothing flows out the outlet. remove the thermostat or an inlet hose and coolant flows out.
I overheated pretty bad... I drove maybe 10-15 minutes unaware. I suspected blown head gasket but no missing coolant and nothing in the oil. I removed the water outlet pipe and thermostat and just poured coolant in to see if any reached behind the thermostat. It did.
I even started the engine with it removed and coolant flowed out. now it didn't pour out...as in filling the entire diameter and squirting out... HOW MUCH pressure or flow should be normal there.
I am really stuck. I don't think air is an issue because I don't have a radiator cap. I am thinking blown head gasket restricting flow? New water pump is not up to par ?
Why the hell won't the thermostat open at all!!!!??? removed I get some flow!!! Its a get a jiggle pin. I am about to take into to be diagnosed but I cant believe this problem has turned into this. Can they test head gasket? I am preparing myself to do the head gasket and the rest.
Ford F-150 - 1997-2003 :: Coolant In Spark Plug Hole
Okay so I was getting the misfire in cylinder 3 so I pulled the plug out and it had coolant in it. Does that mean it needs a new intake manifold gasket? That is what the guy told me at the parts store. Also can I drive it like this or will it damage the engine?
View 1 RepliesFord F-150 - 1997-2003 :: Coolant Temp Gauge Only Goes Up 1/4 Full
I have a 2002 supercrew 5.4 triton. My coolant temp gauge is acting up. When it starts up its obviously in the cold range but when the truck begins to get up to temp, the gauge only goes up 1/4 full. What it can be?
View 4 RepliesFord F-150 - 1997-2003 :: 1999 - Smells Like Oil In Coolant Reservoir
I have a 99 Ford F-150 Lariat. I am smelling oil in my coolant reservoir. I have looked all over the engine and do not see any leaks. I do not see any oil on the ground. The truck does not overheat so I don't know how it is getting in. My engine runs great. What can be causing this problem?
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