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PO453 Code

11-17-2011, 08:15 AM
1999 Jimmy
I had my "servive engine soon" light come on. I took it to a mechanic to diagnose and he said the fuel tank pressure sensor was bad. They did a complete diagnostic, not with just a hand held scanner. They recommended that I replace the whole fuel pump because it has a bad check valve. I just had it replaced about 4 years ago. The fuel pump is working fine and all I want is the SES light to go off. I plan on doing this project myself so what I want to know is should I replace a 4 year old pump or will just replacing the pressure sensor make the light go out? Thank you

11-17-2011, 10:44 AM
What does the fp have to do with the cel/sensor? If you feel while you are in there it should be done, different story.

11-17-2011, 07:05 PM
is the sensor bad?
You also have vent lines that can get clogged or pinched. If you need to drop the tank to do this then I would think about doing the pump as well. Or you could leave the light on. Doing the pump is a lot of work and money just to clear a code,

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