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moparfl
moparfl, ASE Certified Technician
Category: Chrysler
Satisfied Customers: 6330
Experience:  ASE and CHRYSLER Master Tech 30 years Chrysler Dodge&Jeep Dealership Exp
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check engine light code p0420

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check engine light code p0420
Can you give me the model and year along with the eng size?
Customer: replied 8 years ago.

Check engine code is 420 I replaced all 4 O2 sensors ,

code 420 catalist performing below levels, bank 1

does this mean I have to change the drivers side Catilitor converter also?

CAN YOU GIVE ME THE MODEL AND YEAR AND ENG SIZE???
Customer: replied 8 years ago.
2004 Chrysler 300M special with 3.5L engine
Yes this is a fault code for a bad drivers side catilist.this code will also set if there is a exhust leak as well on that side.The catilist is covered under warranty for 8 years or 80k
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