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P0454 code after tune

akiraproject24

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#22
I had a similar issue on an impreza. Subaru dealer had no clue through a new ecu at it! 2 mechanics in NH no clue after smoke tests.

Got it to a little shop in PA and he licked his fingers stuck em in the air and said " fuel tank or fuel tank gasket". Had him change the gasket and no more codes. Maybe it's some seal between the fill hole and the tank?
 


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Bell, CA, USA
#23
The P061a isn't emissions related. If you're tuned, it's not a issue, just the car freaking out about the extra torque.
Fasho, just looked into that today lol thanks bruv. I did find out my catch can hose was compromised so I replaced it and cleaned the area lol. How ever Im stuck with p1450 "unable to bleed up tank vacuum" after fueling Dx.
 


dhminer

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#24
Fasho, just looked into that today lol thanks bruv. I did find out my catch can hose was compromised so I replaced it and cleaned the area lol. How ever Im stuck with p1450 "unable to bleed up tank vacuum" after fueling Dx.
I’ve had this code so many times. I just clear it out and it eventually stops coming back. Can replace the evap harness if you want, too. It’s under $150 and pretty easy to do
 


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Location
Bell, CA, USA
#25
I’ve had this code so many times. I just clear it out and it eventually stops coming back. Can replace the evap harness if you want, too. It’s under $150 and pretty easy to do
I had replaced a while back under warranty; I honestly don't think it could be it im suspecting somewhere from the goose neck to the charcoal canister :unsure:
 


FiestaSTdude

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#26
Fasho, just looked into that today lol thanks bruv. I did find out my catch can hose was compromised so I replaced it and cleaned the area lol. How ever Im stuck with p1450 "unable to bleed up tank vacuum" after fueling Dx.
When my car had that code, I fixed it by replacing the EVAP purge valve
 


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Location
Bell, CA, USA
#27
When my car had that code, I fixed it by replacing the EVAP purge valve
Been looking around the internet and my car: so there are 2 purge valves on our vehicles; one under the hood the most know of (harness valve) and the other is on the charcoal canister itself which tends to go out as well.
 


TyphoonFiST

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Rich-fizzield
#28
I had replaced a while back under warranty; I honestly don't think it could be it im suspecting somewhere from the goose neck to the charcoal canister :unsure:
Or the charcoal canister took it in the pants from some road debris*[thankyou] Unless you have a Evap skid plate or Rear metal splitter.
 


Last edited:

Woods247

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#30
Maybe I missed it but what’s the solution to fixing p0454?
 


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Santa Rosa
#32
I replaced my Evap harness in the engine bay (includes new purge valve) after getting a soft code for the evap issues. Couple months later I get a CEL on the dash for the P0454, which specifically says its the pressure sensor/switch so my guess is its not the evap purge valve, but the cannister sensor or sensor in the tank...
 


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