Question about 2003 Toyota Tundra
Truck runs fine even with check engine light on. clears itself after several cycles
Posted by Anonymous on
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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
check air filter for dirty , how many miles or kms have your car? , maybe need to replace spark plugs, try to reset the ecu for a momentany malfunction, remove the negative battery terminal few minutes and reconnect,start engine and drive, check if lights goes off , please write me
Posted on Jul 05, 2009
Not just a faulty catalytic converter will trigger this code. Many other issues can trigger this code.
Posted on Aug 25, 2009
If the code has cleared on its own then you need to disconnect the battery and re-connect it. This will clear the codes out of the memory. If you don't want to do this you can go to an auto parts strore and have them hook the little computer up to your car and they can clear out the code as well.
Posted on Sep 02, 2009
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