I spoke with some folks at a shop and I couldn't get a specific answer. I have a 2000 chevy s-10 and it threw po452. Gradually over a period of a week it got harder and harder to start. Finally it died. I was having a strong gas smell and was told that the evap control valve would be the culprit. Where is it exactly? I know the sensor is on top of the tank, and the regulating unit is back by the tank to. The only schematic that I can find shows the control valve somewhere near the throttle body. Can some one tell me more specifics? Thanks!

Code 452 is for fuel tank pressure sensor problem.

But should not cause no start.

Any other codes?

Check fuel pressure and look for the gas smell.

What engine?