Question about 2002 Toyota Avalon
Unfortunately, emissions and intake codes like that can mean a huge variety of problems ranging from a bad sensor to a vacuum leak or other random problems. A cheap place to start is to replace your PCV valve, gas cap, and add some injector cleaner like Seafoam or Lucas.
Those are the only likely things that would cause the problem and cost less than the cost of a mechanic's diagnosis, which will run between $50 and $100 to determine it. They will usually perform a smoke test to check for vacuum leaks or use a more complicated scanner than the one you used to get those basic codes.
If you have one of the premium models that shows you the readings of the sensors as well as the trouble codes, you may be able to narrow it down.
Posted on Oct 24, 2012
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
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
SOURCE: engine light on Codes show
Hello! Those three codes commonly indicate the followi possibilities:
The gas cap was not sufficiently tightenend ater fueling, a bad gas-cap rubber o-ring, the vehicle had the key in the 'on', or engine running, or the tank was filed all of the way up the neck.
Any one of the abope causes will set all three codes.
Posted on Dec 21, 2009
Tips for a great answer:
Feb 03, 2014 | Cars & Trucks
Oct 15, 2011 | 2006 Hyundai Sonata
Aug 19, 2011 | 2004 Toyota ECHO
Jul 11, 2011 | Chevrolet S 10 Cars & Trucks
Sep 28, 2010 | 1999 Ford Taurus
Nov 03, 2009 | 2005 Hyundai Santa Fe
Mar 29, 2009 | 1997 Toyota Camry
Nov 17, 2008 | 2001 Toyota Corolla
Feb 17, 2015 | 2002 Toyota Avalon
314 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: