Mechanics

CHECK ENGINE LIGHT

2002 Mitsubishi Lancer

Electrical problem
2002 Mitsubishi Lancer 4 cyl Front Wheel Drive Automatic 147000 miles

Check engine light is on, dealer wants to replace catalytic converter for 1000. Went to muffler shop they say check engine light code is 421 which is no reason to replace converter, so they can not. What can I do to troubleshoot this.
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Dweedsport@tds.net
July 3, 2008.




That's odd that muffler shop is telling you this, since a P0421 code is for Cat Converter below threshold. This is USUALLY caused by an internal failure to the cat. Converter.

Tiny
Jeff Lydic
Jul 3, 2008.


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