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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

engine temp incorrect

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Old Oct 12, 2009 | 12:39 PM
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JDH70518
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From: Lafayette, LA 70508
engine temp incorrect

I have a 2006 F350 that had an issue this morning. When I got in the truck and turned the key on the panel said check engine temperature. The gauge was pegged in the red and my outlook monitor said 300°. This cannot be possible for the truck had been sitting in 70° weather for over 12 hours. I started it and ran it for about 5 minutes, running very weak with fan clutch engaged the entire time. After 5 minutes the temperature immediately came down to the normal 200° and ran fine all the way to work (30miles). It did the same thing when I got in it at lunch. The truck is not running hot but somehow the computer says it is. Does anyone have any suggestions. I would rather not start changing sensors, part, etc. without hearing some suggestions.
 
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Old Oct 12, 2009 | 12:45 PM
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JDH70518
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Also ran the heater when first started to see if motor was actually hot. The air was cold for a while just like normal.
 
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Old Oct 12, 2009 | 12:50 PM
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cartmanea
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Bad temp sensor or bad wire somewhere.
 
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Old Oct 12, 2009 | 01:18 PM
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Do you happen to know where this sensor is located on the engine.
 
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Old Oct 12, 2009 | 01:57 PM
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No I don't.
 
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