cooling fan won't run P0480

1997 CHEVROLET CAVALIER
215,000 MILES
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PELT7358
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I have tested the fan, relay and changed the temp sunsor with a used good sensor. If I jump the relay out the fan runs, I have power to the relay coil but it doesn't have a ground through the control module.
Sep 11, 2011 at 11:13 PM
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ASEMASTER6371
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the computer needs to see the temp of the motor to turn it on. the coolant sensor provides the info. you need to have that checked.
does it work with the ac on??
let a shop use a scanner to verify the pcm is seeing a signal.

Roy
Sep 11, 2011 at 11:16 PM
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PELT7358
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The AC douesn't work and the temp gauge inside the car works properly with both sensors I tried. Is the gauge and computer seperate but off of the same signal.
Sep 11, 2011 at 11:32 PM
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ASEMASTER6371
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the coolant sensor is different than the temp sensor for the dash it is located by the thermostat housing and has 3 or 2 wires on it. it is cheap for the part and you may want to try this first before taking it to a shop for a bid.

Roy
Sep 12, 2011 at 12:18 AM