Re: CEL P0452 code - Saab 9-5 Bulletin Board - Saabnet.com
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Re: CEL P0452 code
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Posted by mike9 (more from mike9) on Thu, 26 Jun 2008 21:13:05 Share Post by Email
In Reply to: CEL P0452 code, bbjoeyo, Thu, 26 Jun 2008 16:34:32
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P0452 is the tank pressure sensor...isnt reading correctly....its shorted to ground the readings would be zero kpa ...1999 car been in service...a while... heres whats happing....after you shut the engine off...the T-7 fuel system is testing the tank pressure...as everything is cooling off...it usually requires a full cold to hot drive cycle and cool off...for all fuel evap codes to set...may take 2 days for any fuel evap codes to set.... its rare its a tank pressure sensor....very expensive...
if a fuel pump installation...has been done...i would look in that area...what a saab technician would do is drive the car and monitor...tank pressure...with a scan tool see what the readings are...then make an evaluation....

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