Trouble Codes when towing?
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Joined: Jul 2005
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Trouble Codes when towing?
Ok here it goes. This only happens when I am towing my 35ft toy box 5th wheel.
And generally only up long pulls up hill. I will get a check engine light. It will go away after about the 3rd restart after I stop pulling my trailer. I ran the codes and it shows P0404 which is EGR. Then yesterday my tow / haul light started flashing. But no trouble code stored. The light would stop flashing, then start again. As soon as I stopped towing and turned the tuck back on, no more light.
Any ideas?
And generally only up long pulls up hill. I will get a check engine light. It will go away after about the 3rd restart after I stop pulling my trailer. I ran the codes and it shows P0404 which is EGR. Then yesterday my tow / haul light started flashing. But no trouble code stored. The light would stop flashing, then start again. As soon as I stopped towing and turned the tuck back on, no more light.
Any ideas?
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
It's possible you have codes stored that your reader isn't capable of reading. Regardless, it sounds like you also have a bad EGR valve. Try cleaning it and having your codes read by something different.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
His profile says 2003 MY but being in Az. he may very well have a California flashed truck which turns the CEL on for EGR codes, IIRC. No CEL for ECT/EOT's on those, as I'm sure you already know.
Senior User
Joined: Sep 2010
Posts: 306
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From: Southwest Desert, AZ
codes for towing
Mofire,
Same with my 06 F350 DRW, Threw p0404, during long uphill pull. Never had the Tow light flashing though. Ford replaced oil cooler due to EOT vs ECT more than 15 degree spread. I ripped out the EGR cooler and Valve. Haven't had a problem since. Pulled the I-17 north bound from PHX to Flag in August with 28' toy hauler 8K+. No more problem. I'm in Yuma if you're close by, and need help.
928-503-2194
Same with my 06 F350 DRW, Threw p0404, during long uphill pull. Never had the Tow light flashing though. Ford replaced oil cooler due to EOT vs ECT more than 15 degree spread. I ripped out the EGR cooler and Valve. Haven't had a problem since. Pulled the I-17 north bound from PHX to Flag in August with 28' toy hauler 8K+. No more problem. I'm in Yuma if you're close by, and need help.
928-503-2194
Last edited by phantomphixer; Jan 18, 2012 at 09:45 PM. Reason: adding a note
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