Question about 2000 Toyota Celica
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Posted on Jan 02, 2017
These codes are all for the Evaporative Emissions System.
P0440- Evaporative emissions system fault- just saying there's something wrong with the system.
P0441- Evaporative emissions system- Incorrect purge flow- saying that the system isn't purging the raw fuel vapors (hydrocarbons- HC) as well as it should.
P0446- Evaporative emissions system- Control valve circuit low- there is a valve, usually located on the charcoal canister at the rear of the vehicle, that opens to allow fresh air to enter the evaporative emissions system as the engine vacuum purges the fuel vapors from the charcoal canister and closes when purge is not needed to prevent leakage of those fuel vapors to the atmosphere (HC is a greenhouse gas and is regulated as such by the fed gov't).
Given that you have the incorrect purge flow code and the control valve code together, my bet is that the vent control valve has failed (causing the P0446) and is not opening to allow fresh air into the system to displace the air from within the system that is being pulled to the engine. Since you have no fresh air entering the system, the engine will pull a vacuum on the system instead of the vapors "flowing" into the engine (causing the P0441).
I hope that this is helpful to you!!!
ASE Master Technician with L1 and X1 Certifications; Nissan Scope Technician; Chrysler Level 3 Silver Technician- 12+ years experience.
Posted on Nov 17, 2008
p0441 - Evaporative emission control system Incorrect purge flow. can be caused by a lot of things and is usually related to a small leak in the emission control evap system, try replacing the gas cap and see if it helps, if not, the system needs to be tested for a leak with the scantool or a leak tester or both.
usually you will see p0440 p0441 and p0446 together but before anything replace your gas cap and besure to tighten it down when you gas up the vehicle, 90% of the time with those codes either a loose gas cap of bad gas cap gasket is the problem
Otherwise - Might be a canister leak, defective VSV valve or hoses, bad gascap seal.
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Posted on Mar 17, 2009
You have a high compression ratio engine and it's recommended to use 91 octane. You can get away with the 89 octane, but the higher the better for the engine. Less chances of detonation (Engine Knock), Take note that it's best to keep faith full on servicing the Engine for Oil and filter changes. Good luck and keep me posted, be glad to help.
Posted on Jun 12, 2009
i would suggest getting a replacement e/w motor from the breakers yard and swithing it over. much cheaper then paying for a diagnostic!! its not a big job and shouldt cost much. id def use breakers for new motors as toyota charge a massive price for everything!!!!
Posted on Jun 29, 2009
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