1998 Chevy S-10 failed emissions test

1998 CHEVROLET S-10
140,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JD70CHALLENGER
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The fault codes are

p0452 evap control system pressure sensor low input

P0453 evap control system pressure sensor high input

can you tell me what i should look for or what part or parts maybe i should replace?
Feb 6, 2008 at 1:32 PM
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2CARPRO JACK
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You will need a scanner to monitor the voltages for the sensor. It ison top of the fuel tank.COuld just be a bad sensor....... any previous work or anything done to the truck?
Feb 7, 2008 at 11:55 AM
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JD70CHALLENGER
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thanks for your reply no work done to vehicle. i do not have access to a scaner. is it worth replacing the sensor even though i realize it's hunting and pecking?
Feb 7, 2008 at 2:22 PM
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2CARPRO JACK
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Might be since it said both ranges were off on the sensor
Feb 7, 2008 at 5:58 PM