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  1. P0451 - EVAP System Pressure Sensor Performance - Geo Metro …

    Jul 26, 2010 · P0451 Evaporative Emission Control System Pressure Sensor Range/Performance GM code setting criteria P0451 EVAP System Pressure Sensor Circuit Fault: Engine running …

  2. Check Engine Light Guide - Geo Metro Forum

    Sep 11, 2008 · P0451 - EVAP System Pressure Sensor Performance P0455 - EVAP System Malfunction, Large Leak Detected P0461 - Fuel Level Sensor Circuit Performance Problem …

  3. Trouble code P0451 - Geo Metro Forum

    Mar 25, 2012 · Mechanic says I need an EVAP pressure control valve. I found online an ACDelco 30020521 Fuel Tank Sensor. Is that the item I'm looking for? Thanks!

  4. Vapor Pressure Build Up in Gas Tank - Geo Metro Forum

    Jan 10, 2012 · So I checked the fuel system and when I went to open the gas tank, it took a lot of effort and it released A LOT of fuel vapor. Now we had a P0451 code come up the other day, …

  5. diagnostic codes not working - Geo Metro Forum

    Jun 3, 2016 · My OBD II stopped working. Any reason why the connection no longer gives info?? thanx

  6. Check Engine Codes - Geo Metro Forum

    Check Engine Codes: If you have a pre-1996 Metro and the "Check Engine" light on and would like to find out why, you need to access your fuse panel an