engine light comes on while going up a hill loaded - Ford Powerstroke Diesel Forum
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Old 09-21-2010, 01:05 AM
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engine light comes on while going up a hill loaded

I have a 2003 f350 4x4 quad cab dually with 165,000 bone stock, seems that whenever i pull my trailer with my rock crawler up a decent hill the ses light comes on, then the light turns off bout five min afterwards or so... I tried to pull a code from it using my new reader but it said everything was great, no Codes...the trailer and crawlers weight combined is about 6500- 7000 pounds. i would much appreciate your imputs, and yes I did search thanks
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Old 09-21-2010, 01:49 AM
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Possible Overboost Condition causing SES light to set?

Im a not a 7.3 guy, but i "think" i have heard about this before. Just throwin it out there.
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Old 09-21-2010, 02:50 AM
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yea im not a 7.3 guy either but a friend of mine had a 7.3 modded and if you worked it a little it would throw a over boost code and then clear it self shortly after
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Old 09-22-2010, 07:25 AM
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I have the same problem when towing my 5th wheel, everthing is fine until I get into several long hills and start shifting out of overdrive the SES light comes on. It may stay for 10 minutes, or may stay on until I make my next stop. Then it stays off until I get into a long pull again. It never comes on any other time, just while pulling hard up long hills. My truck is 02, 7.3, automatic, 4 wheel drive, only mod is 6637 air filter. I can never get any codes because by the time I get it somewhere to have reader plugged in the light is off.
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Old 09-22-2010, 07:33 AM
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yeah I ended up throwing my reader in my arm rest storage so when it does happen again I can plug that thing in pronto!
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Old 09-22-2010, 07:36 AM
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can plug the reader in while the truck is running? Once I shut the thing off and turn the key on the light is off.
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Old 09-22-2010, 07:51 AM
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Quote:
Originally Posted by good9682 View Post
I have the same problem when towing my 5th wheel, everthing is fine until I get into several long hills and start shifting out of overdrive the SES light comes on. It may stay for 10 minutes, or may stay on until I make my next stop. Then it stays off until I get into a long pull again. It never comes on any other time, just while pulling hard up long hills. My truck is 02, 7.3, automatic, 4 wheel drive, only mod is 6637 air filter. I can never get any codes because by the time I get it somewhere to have reader plugged in the light is off.
It doesnt matter if the SES light goes back off. The code is still stored. You will be able to read it regardless of the light being on or off if you are using a quality code reader. The ones they use at oreilly's,napa, auto zone, etc... do not work for these powerstrokes..
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Old 09-22-2010, 08:01 AM
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what kind of reader do I need to look for, I called local Ford dealer, service manager told the light had to be for them to get any codes (not surprised). If I know what kind of reader to look I can call around and ask.
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