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1996 Toyota Land Cruiser Question: my check engine light came on and its staying on whats the problem? not blinking

 

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dowdy, 4.5L 6 Cylinder, Rochester, NY, January 09, 2012, 14:55
 Rookie

i remember that it came on a couple of months ago for awhile and i remember filling up one day with regular gas and it went off, but now its back on. i had a cat put on a few years ago. i hope thats not the problem.could it be the rear 02 sensor.

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  • Answer #1

    PARTS GUY January 09, 2012, 16:26
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     Master

    Need trouble codes to help you. Go to a parts house and get a free code readout.

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    dowdy, January 09, 2012, 20:16
     Rookie

    i used a hand held dianogstic machine and the code that came up was PO420

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