Check Engine light / Radiator fluid smell

1990 FORD F-350
190,000 MILES
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LOUWHOSHIPOOPI
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My check engine light keeps coming on and off. It usually comes on when I am on the highway doing around 65. I occasionally smell radiator fluid. The transmission was flushed about 2 months ago and I am keeping regular on the oil change.

I checked the gas caps and they are on tight.

What could be causing this and could it be a pricey fix?
May 18, 2012 at 11:04 PM
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RASMATAZ
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ATTEMPT TO PULL CODE/S FROM THE COMPUTER IF ANY PRESENT POST THEM-START HERE
May 18, 2012 at 11:19 PM
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DJCL
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As far as the coolant smell have the cooling system pressure tested to find the leak. If your smelling coolant in the truck the heater might be leaking . The engine light will have to go on a scanner to check the codes .
May 18, 2012 at 11:22 PM
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