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Code PO420 is catalytic converter efficiency low bank 1, sensor1. You did not state as to the year,make and model of the car as well as the engine size. I am a member of IATN and the majority of there fixes was related to someone installing an AFTER MARKET converter. There is a big difference. I strongly suggest that you go to a repair shop with the proper equipment as well as a very good tech to diagnosis the problem.
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What are the signs of a bad catalytic converter 2005 Chrysler pacifica?
Usual first sign is a check engine light with a code P0420.Usual first sign is a check engine light with a code P0420.
What does check engine code P0420 on Chevy Prizm?
Trouble code P0420 means:Catalyst system efficiency below threshold
What does check engine light error code p0420 mean?
Trouble code P0420 means:Catalyst system efficiency below threshold
What is check engine error code P0420 on a 2003 vibe?
Trouble code P0420 means:Catalyst system efficiency below threshold
Check engine light code P0420 on a 2004 Buick Century?
Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
99 Chevy lumina check engine code is p0420 what does it mean?
Low catalytic converter efficiency.
What is p0420 engine code?
P0420, bank one catalytic converter efficiency failure.
Why do i get engine code p0420 for a 2002 Nissan actima?
Trouble code P0420 means:Catalyst system efficiency below threshold
What does Engine light code P0420 on 2000 Toyota 4 runner mean?
Trouble code P0420 means:Catalyst system efficiency below threshold
What does check engine code P0420 for a 2006 Dodge Grand Caravan mean?
catalytic converter failure.
2005 Impala with a engine code P0420 hat do you need to replace?
I have a 2005 Impala as well.....I bought a code scanner when my check engine light came on....2 codes came up on the scanner...P0420 and P0420PD.....'catalyst below efficiency'....My car has 115,000 miles on it and it was time for annual safety/emissions inspection so I took it in to a shop.....The catalytic converter had gone bad and had to be replaced.....which was the reason for the P0420 code....
What is the diagnostic code p0420 on a 2003 dodge grand caravan 3.8 liter engine?
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
