1998, Chevrolet Suburban
Replace the Catalytic converter 2 times and o2 cencers
1 time and the spire fuel managment system for injectors
comments = Dear MW: I keep getting the code P0420 on muy vehicle i do
not know what to do now.
MW:
Hello and welcome. Is the exhaust in the truck the system with 2 cat. converters just
after each manifold, (y- pipe setup) or are there 2 converters, one further down the
exhaust then the other. I will wait for your reply and try to help, thanks.
Visitor reply:
Yes there are 2 cat. one for each bank and they meet at the muffler
MW:
OK, thanks. That code is very straight forward of bad #1 cat. 2 possibilities. Either the
replacement converters are of poor quality and not cleaning the exhaust up enough
for the computers readings, or something is burning them up. A constant missfire will
burn up a convertor, an inaccurate o2 sensor can also make for a rich condition and
cause a converter to go bad after a period of time.Poor quality fuel, or high alcohol
level can damage a cat., as well as engine burning coolant or oil. Need to have a
detailed overall diagnosis of the engine and control systems. i will run this past the
other guys and see if they have any other ideas.
Visitor reply:
OK thanks for your help. I took the SUV to a high performance mechanic and he
found a defective o2 sensor after the cat and I have now the bula high performance
cats on it.
Back
Replace the Catalytic converter 2 times and o2 cencers
1 time and the spire fuel managment system for injectors
comments = Dear MW: I keep getting the code P0420 on muy vehicle i do
not know what to do now.
MW:
Hello and welcome. Is the exhaust in the truck the system with 2 cat. converters just
after each manifold, (y- pipe setup) or are there 2 converters, one further down the
exhaust then the other. I will wait for your reply and try to help, thanks.
Visitor reply:
Yes there are 2 cat. one for each bank and they meet at the muffler
MW:
OK, thanks. That code is very straight forward of bad #1 cat. 2 possibilities. Either the
replacement converters are of poor quality and not cleaning the exhaust up enough
for the computers readings, or something is burning them up. A constant missfire will
burn up a convertor, an inaccurate o2 sensor can also make for a rich condition and
cause a converter to go bad after a period of time.Poor quality fuel, or high alcohol
level can damage a cat., as well as engine burning coolant or oil. Need to have a
detailed overall diagnosis of the engine and control systems. i will run this past the
other guys and see if they have any other ideas.
Visitor reply:
OK thanks for your help. I took the SUV to a high performance mechanic and he
found a defective o2 sensor after the cat and I have now the bula high performance
cats on it.
Back
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