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P0420 Pontiac -
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asked
Dec 28, 2016
by
shawn fogg
what part I need to fix this problem
Vehicle:
2002,pontiac am gt v6
p0420
code
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Feb 5, 2018
by
Carguy1
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13.5k
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HI there,
In most cases you will need to replace the bank 1 catalytic converter. Other things that can cause the code however is a poorly running engine, exhaust leak or a faulty rear O2 sensor. All should be checked prior to replacing the catalytic converter.
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