change everything plugs air fliter oil change front and back o2 sencers drove from god nos were its sayin on my freind machice it passes but engine light still on and i no i got to get it inspected their not gonna pass it
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Ask Your Question2005 Toyota Corolla
Question: engine light still on
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Answer #1
Visitor, May 30, 2010, 15:47what code is stored??
Roy
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timer2766, May 30, 2010, 16:05ReplyRookiep0420
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Answer #2
patrick mannion from Greg Solow's Engine Room, May 30, 2010, 18:27Reply
MasterP0420 is low catalytic converter efficiency code. Usually a sign that the cat. converter is failing. This code can be set if the engine is out of tune or the Oxygen sensors are not operating correctly.
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