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b5demon
b5demon, Dodge Technician
Category: Dodge
Satisfied Customers: 3720
Experience:  ASE and Chrysler master technician for over 17 years Sprinter and Viper specialist
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diagnostic code for a 1999 durango. code P0420

Customer Question

diagnostic code for a 1999 durango. code P0420
Submitted: 8 years ago.
Category: Dodge
Expert:  b5demon replied 8 years ago.
HiCustomer Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
-What year is your Dodge?
-What model is your Dodge?
-How many miles are on your Dodge?
-What type of engine is in your Dodge?
-What have you already tried?

Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
Customer: replied 8 years ago.

YEAR 1999

MODEL DURANGO

MILES 148623

ENGINE 5.2

TRIED RAN THE DIAGNOSTIC MACHINE ON IT, BECAUSE THE CHECK ENGINE LIGHT CAME ON

 

Expert:  b5demon replied 8 years ago.

ok that code is for catalytic convertor efficiency here are the possible causes

EXHAUST LEAK

ENGINE MECHANICAL PROBLEM

CATALYTIC CONVERTER DEFECTIVE

UPSTREAM O2 SENSOR OLDER THAN DOWNSTREAM O2 SENSOR

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