Question about 2003 Toyota Corolla

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P0420 2003 Toyota Corolla, HELP! - 2003 Toyota Corolla

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  • Anonymous Apr 17, 2009

    check engine light on, code is PO420, however each time there is a list of 3 or 4 possible causes, my mechanic has checked or fixed all of them short of replacing the 02 sensor and converter. His other manual test on the converter do not support the converter being bad

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FYI more background on a P0420 - http://p0420.com

Posted on Apr 10, 2009

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P0420 is a code for catalytic converter efficiency, the cat will need to be replaced. in some instances a software upgrade to the engine computer may be needed

Posted on Dec 23, 2008

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SOURCE: Help with toyota corolla 2003 code P0420

CODE PO420 CATALTYLIC CONVERTER SYSTEM FAULT.ITS SAYING FAULTY CATALTYLIC CONVERTER.IF IT BEEN A WHILE IF YOUR CAR HAS A WHOLE LOT OF MILES ON IT.YOUR SPARK PLUG CHANGE IS DUE AT 120000 MILES. DUE A LITTLE TUNE UP CHANGE AIR FILTER AND FUEL FILTER.SEE IF YOU HAVE ANY ENGINE FAULTS BAD PLUGS DIRTY INJECTORS ANY THING UP SET FUEL SYSTEM CAUSE CAR TO RUN RICH.EXCESSIVE UNBURN FUEL WILL GATHER IN CATALYTIC CONVERTER CAUSE IT TO BURN OUT.SHORTING LIFE OF THE CATALYTIC CONVERTER.

Posted on Aug 30, 2009

dsacco86
  • 1077 Answers

SOURCE: 2003 Toyota Corolla LE back seat fold down? how?!

Open the back trunk, look near the top of the trunk, and pull the two black levers. They have a seat folding down symbol. That will release the locks to fold the back seat down.

Posted on Jul 04, 2009

jagjeffery
  • 316 Answers

SOURCE: 2003 Toyota corolla A/C compressor not coming on fuse good, A/C charged, no pwer at compressor

it is located in the engine compartment fuse / junction box it is on the drivers side then cover to the box will show you witch one it is ( the relay will be white in color)

Posted on May 30, 2009

  • 1861 Answers

SOURCE: where is the fuse box on a 2003 Toyota Corolla?

Hello, welcome to FixYa.

The fusebox for an 03 Corolla is on the driver's side of the dash, above the plastic panel that is above your knees. You can see it by looking up and to the left, under the instrument pane, with a flashlight. It is a rather large white or cream-coloured box (depending on where the car was produced). An easier way to get to the fuses would be to remove the plastic trim panel that is directly under the bottom of the instrument panel.

Thanks for choosing FixYa for assistance today.

Posted on Jul 20, 2010

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