Question about 1999 Chevrolet Suburban
Where is it?
Hello, You have an emission sytem problem . The actual sensor is on top of the fuel tank that lets the system know how much air pressure is on the system, its made in the fuel pump module, but if your system has a po440 code do not waste your time replacing it. You (99 percent sure) will have a canister and vent valve. They will cost about 150 dollars to replace. Please rate my answer. Thank You.
Posted on Feb 23, 2009
Will this FTP sensor make your vehilce run rough/hesitate?
Posted on Jan 07, 2012
P0453 is for the fuel tank pressure sensor. This code means that the voltage on the sensor was greater than 4.5V during key on engine off or during any engine operating mode.
Normal voltage from this sensor with no vacuum or pressure on the system should be 2.37 to 2.97V.
PCM sends a reference voltage of 5V to the sensor and tells if there is pressure or vacuum in the fuel tank by the voltage that returns from the sensor.
Possible causes are:
Usually it is a loose connector at the sensor or a bad sensor.
It mounts on top of the fuel tank,has a 3 wire connector. To replace it you have to push down on it and twist,if I remember right CC.
Posted on Mar 10, 2009
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Posted on Jan 02, 2017
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