Tow Haul Flashing - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 11-18-2007, 10:28 PM   #1 (permalink)
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Tow Haul Flashing

This evening driving home my 2005 F350 6.0 automatic the tow haul light started flashing and the instrument panel display said CHECK TRANSMISSION TEMPERATURE. I looked at the gauge and it was showing stone cold. When the instrument panel display was clear I pressed info and reset to check systems and it said transmission temperature OK. I pulled over into a parking lot and crawled under the truck and carefully felt the transmission pan and it was warm but not uncomfortably so. Could it have a cooler bypass valve stuck open or possibly a bad sensor. Later while driving the gauge moved up a little above cold briefly and went back to stone cold. Anyone had this experience?

Thanks,
Bob
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Old 11-18-2007, 10:37 PM   #2 (permalink)
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Re: Tow Haul Flashing

happened to my truck...but it was jerking heavily. and not to long after my tranny blew up..it normaly did it between changing files on the tuner or something of that nature.
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Old 11-19-2007, 07:49 AM   #3 (permalink)
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Re: Tow Haul Flashing

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TBROKER</div><div class="ubbcode-body">Could it have a cooler bypass valve stuck open or possibly a bad sensor. </div></div>
There's a thermostat inside the trans that diverts fluid from the cooler when it's cold. It's possible, but not likely that this is the problem.

Most likely it is the temperature sensor. There's a code stored in the TCM that will tell why the tow/haul was flashing. It takes the right type of scan tool to read it, so you might have to go to a dealer to get the code read. Don't believe it if someone tries to read the codes and says there isn't one. That just means their scan tool can't read it. When the tow/haul flashes a code is stored and stays in the memory for about a month.
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Old 11-19-2007, 03:50 PM   #4 (permalink)
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Re: Tow Haul Flashing

Hi Mark,

I took it to the dealer this morning and the service writer just called to tell me that the problem is the temperature sensor. What I expected from the way the gauge was acting.

Thanks,
Bob
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Old 11-22-2007, 01:07 PM   #5 (permalink)
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Re: Tow Haul Flashing

Good to hear nothing real bad. My 03 started showing a high temp. reading, the tow, haul blinks and the check light is on, I have an appointment monday to have it checked, I have 94,000 on the truck, its been good to me,,,,,,,,Tim
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Old 12-18-2007, 05:28 PM   #6 (permalink)
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Re: Tow Haul Flashing

I'm Having similar issues with my truck. Does anyone know where the factory trans temp sensor is located?
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Old 12-18-2007, 07:30 PM   #7 (permalink)
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Re: Tow Haul Flashing

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: POWERHORSE</div><div class="ubbcode-body">I'm Having similar issues with my truck. Does anyone know where the factory trans temp sensor is located? </div></div>

In the pan on the valve body.
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