2003 Pontiac Montana Service Engine soon light

2003 PONTIAC MONTANA
67,000 MILES • 6 CYL • FWD • AUTOMATIC
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JOSEPH7
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My wife left the gas cap loose which made the service engine light come on.I scanned it after putting the cap back on and it was an emissions code.I cleared it and it stayed off for a while.It only comes back on after clearing after I have driven it and turn it off.
I scanned it again, and it said :
p0453
evaporative emissions control
system pressure
sensor high input
Is it possible th sensor is bad and is it located inside the tank?
Any info will be appreciated.Thanx, sincerely, Joseph Fleeman
Apr 5, 2008 at 8:01 AM
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