Cil Po420
kinger26
06-12-2007, 05:21 PM
Hi, I've got a 420 code on my 2000 Elantra. Assuming its the downstream O2 Sensor, does anyone have instructions on replacing this sensor? Is this something that has to be done by a repair garage?
Thanks!
Pete
Thanks!
Pete
The Fast Forester
06-12-2007, 09:19 PM
You might want to get that code checked, I just replaced a downstream O2 sensor on my son's '99 Elantra and it read PO136. Check out the thread for this at http://www.automotiveforums.com/vbulletin/showthread.php?t=659364
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