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Trouble code 420 and 440?


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8 replies to this topic

#1 UMT

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Posted 01 January 2013 - 11:58 AM

99 Impreza Outback Sport.


So, I pulled the codes this morning and got a 420 Fuel Tank Pressure Control Solenoid High Input and 440 Fuel Tank Pressure Control Solenoid Low Input

Where are the above?

Thanks,
UMT

#2 J A Blazer

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Posted 01 January 2013 - 12:11 PM

In my experience the 420 is a cat efficiency code.

#3 davebugs

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Posted 01 January 2013 - 12:13 PM

In my experience the 420 is a cat efficiency code.


Mine too

#4 UMT

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Posted 01 January 2013 - 12:29 PM

Ooops, looks like you gents are correct.

Is there a quick fix?

Thanks,
UMT

#5 Caboobaroo

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Posted 01 January 2013 - 03:31 PM

The P0440 is an evap code and usually it leads to a rusted through fuel filler neck. Is fairly easy to check, just need to remove the right rear wheel and there is an access panel behind the wheel.

#6 davebugs

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Posted 01 January 2013 - 03:41 PM

420 often solved, atleast tempoarily with seafoam through vacuum line and/or spark plug non-fouler(s). Search around here a bit to see how to do these.

#7 Fairtax4me

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Posted 02 January 2013 - 03:13 AM

P0420 catalyst efficiency below threshold.
P0440 evap emissions system.
You got the wrong codes.
Your definitions are for codes P1400 and P1420.

The pressure control solenoid valve is located above the charcoal canister behind the right rear wheel. All of the metal parts back there are prone to rusting. I don't envy you having to remove the canister to get to that valve. I'd expect some corrosion in the wiring or inside the connector. Good possibility of mouse damage too.

#8 1 Lucky Texan

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Posted 02 January 2013 - 08:07 AM

P0420 catalyst efficiency below threshold.
P0440 evap emissions system.
You got the wrong codes.
Your definitions are for codes P1400 and P1420.

The pressure control solenoid valve is located above the charcoal canister behind the right rear wheel. All of the metal parts back there are prone to rusting. I don't envy you having to remove the canister to get to that valve. I'd expect some corrosion in the wiring or inside the connector. Good possibility of mouse damage too.


good call!

#9 cohophysh

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Posted 02 January 2013 - 11:28 PM

420 is legal here in Washington now...wait what were you asking...pass the fritos :D:drunk:




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