Diagnosing codes P0441 and P0455 - Toyota Yaris Forums

truefusion · 05-29-2017, 09:57 PM

I have a 2013 Yaris and it has a check engine light and it is returning a couple of codes (P0441 and P0455), and I would like to try and diagnose the problem, starting at the canister purge valve, but I am having trouble locating it.

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bronsin · 05-30-2017, 01:39 PM

PO441 evap emission control system incorrect purge flow.

Have you checked the gas cap?

WeeYari · 05-30-2017, 02:06 PM

P0455 is a code for a leak but I've only seen one of the codes for a small leak thrown by an improperly sealed gas cap. Not a code for a large or gross leak like the P0455 is, unless the gas cap is not even on.

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truefusion · 05-30-2017, 09:17 PM

Quote:

Originally Posted by WeeYari

... unless the gas cap is not even on.

I jiggled the cap and it basically fell into my hand. I must've not tighened it the last time I pumped gas. I will reset the codes and consider this to be the reason (unless it comes back on), though I am still interested in some kind of diagram of my engine and surrounding area.

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bronsin · 05-31-2017, 05:30 AM

Car is pretty new to something besides the cap

05-29-2017, 09:57 PM	#1
truefusion Drives: Toyota Yaris LE 2013 Join Date: May 2017 Location: USA Posts: 2	Diagnosing codes P0441 and P0455 I have a 2013 Yaris and it has a check engine light and it is returning a couple of codes (P0441 and P0455), and I would like to try and diagnose the problem, starting at the canister purge valve, but I am having trouble locating it. Sent from my VS986 using Tapatalk

05-30-2017, 01:39 PM	#2
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,792	PO441 evap emission control system incorrect purge flow. Have you checked the gas cap? __________________ Synthetic Oil: Its All In Your Head

05-30-2017, 02:06 PM	#3
WeeYari View User's Garage Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008 Location: Georgetown, Ontario, Canada Posts: 5,809	P0455 is a code for a leak but I've only seen one of the codes for a small leak thrown by an improperly sealed gas cap. Not a code for a large or gross leak like the P0455 is, unless the gas cap is not even on. Sent from my Elite_5_5_Octa using Tapatalk __________________

05-31-2017, 05:30 AM	#5
bronsin Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008 Location: nj Posts: 4,792	Car is pretty new to something besides the cap __________________ Synthetic Oil: Its All In Your Head

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