Question about Toyota Solara
P0440 Fuel tank vapor emission problem.
Could be as simple as a leaky gas cap.....or a missing gas cap.
Have you purchased gas and left the engine running as you filled it?
That will turn on the light too.
The P0440 is one of the most common codes and pops on the dash of 50% of cars on the road as they get older on a weekly basis.
An extremely small vapor leak on the fuel system will pop this code on.
Most of the time.....this code cannot be fixed......the answer is to buy a cheap OBD2 code reader and remove the code yourself every time it pops on........and on the 50% of cars with it......it shows up about 2 times a week.
When the engine light is on,you will loose 20% of gas mileage and has 20% higher emissions.....so turn it out!
Some cars will not go into overdrive with this light on.
Posted on Sep 04, 2009
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Posted on Jan 02, 2017
P0420 is catalyst system efficiency below threshold (bank 1)
P0440 is evaporative emission control system malfunction
P0441 is evaporative emission control system incorrect purge flow
Posted on Mar 29, 2009
P0440 and P0441 are refering to the NVLD pump. It is in the rear on the right side up near the fuel tank. P0344 is your cam position sensor on the rear (drivers side) of the cylinder head. The P0440 and 441 are probably why the check engine light is on and the 344 was stored from a previous event. Either way they are two different and unrelated problems. The NVLD (natural vacuum leak detection) pump is an emission item with no effect of the way it runs however it will keep the engine light on. The cam sensor will keep it from starting or intermittently run bad and not necessarily turn the light on. Both parts are easy to change. I hope this helps.
Posted on May 19, 2009
I would try to replace the gas cap first. If that doesn't solve it, you wll have to take it yor local repair shop and have them perform a smoke test. The technician can pinpoint your exact problem. I just fixed a 2003 Cavalier and it was a split gas tank. No other way to find that problem without the smoke.
Posted on Jun 08, 2009
SOURCE: check engine light is on-
Causes: A code P0440 could mean one or more of the following has happened:
* The gas cap is not installed or working properly
* The purge solenoid has failed
* The canister is plugged and not working properly
Possible Solutions: With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
* Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
* Inspect the EVAP system for cuts/holes in tubes/hoses
* Inspect for damaged or disconnected hoses around the Evap purge solenoid
* Check and/or replace the sensor
* Check and/or replace the purge valve
* Have a professional use a smoke machine to detect leaks
Hope helps (remember to rate this).
Posted on Oct 12, 2010
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