i have a 1999 blazer and service engine soon light is on . i scan it it says f.t.p were is that senser at

1999 CHEVROLET BLAZER
175,000 MILES
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STEVE29
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service engine soon light is on
Apr 18, 2012 at 4:56 PM
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JACOBANDNICKOLAS
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Did it give you a trouble code?
Apr 18, 2012 at 5:17 PM
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STEVE29
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i have a actron scanner it sad evaporayive emission system presure senser / switch low input
Apr 18, 2012 at 7:05 PM
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STEVE29
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po452 is the code
Apr 19, 2012 at 5:01 PM
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STEVE29
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helloooo
Apr 24, 2012 at 4:46 PM
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MIKEDEROUIN88
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Check the vacuum purge canister
Apr 26, 2012 at 6:28 AM