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P0451 Diagnostic Trouble Code Discussion for December 2012

Fuel Tank Pressure Sensor Performance

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Trouble Ticket Help Requests for DTC P0451
Help Request Posted
2010 Toyota Prius 1.8L Poor Idle Quality, Stall, MIL Lamp on
P0451: evap pressure sensor range malfunction. I eliminated the following by using a known good part: map, maf sensors. I pinched off the purge vsv and pcv to eliminate them as a vacuum leak. when I spray carb cleaner into the intake plenum the engine runs smooth. the long term fuel is at 30% and the short...
December 13, 2012