Dec 9, 2014 · P0454 Description The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

Dec 16, 2019 · The search feature built into this forum is not the best with pulling older threads. I didn't read through it but I found one, I'm sure there's more with PO454 included.

Oct 12, 2022 · P0454 is a diagnostic trouble code (DTC) for "Evaporative Emission Control System Pressure Sensor Intermittent". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

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Dec 13, 2013 · Thought I would share my story on the p0455 issues with my 2005 tahoe. Usually this tells me that I have a leak in the evap system and to inspect things like gas filler neck, gas cap, canister, operate purge/vent solenoids. I was lucky enought to borrow a smoke machine to try and find the...

Jan 7, 2015 · Check Engine Light- Code P0454. Thread starter Zirk; Start date Jan 7, ...