Q: Evap codes on a Sienna 2001

asked by on

I have a Sienna 2001. My codes are PO440PO446. Evap and catalyst not ready. Do I need to change a charcoal canister?

Yes and unfortunately, with those EVAP codes, it can be a lot of things. On your particular model, the problem is often a bad charcoal canister and EVAP canister vent valve. Which comes as an assembly when you buy it. In order to check this out, it takes a professional mechanic. There is no way around that.

The worst thing would be to guess since it’s an expensive part. A certified technician from YourMechanic can analyze it and fix the issue for you. There is a lot of testing that has to be done because you are dealing with a pretty expensive part, they are very complicated systems.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Evap codes on a Sienna 2001

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What should be the total cost including labor, parts and shipping be for a low mileage engine replacement?

Billing question sent to CS for the cost to send and replace the engine in a Jeep Liberty V-6 3.7L.

Q: washed #8 cylinder

A washed cylinder indicates there has been a large amount of unburned fuel introduced into the cylinder. This usually is a result of a no spark condition which will not ignite the fuel in that cylinder. If this is indeed...

Q: Problem starting after fueling have to give it to start

Hello. All modern cars are equipped with an Evaporative Emission Control (EVAP) system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.