What is your question?
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What is your question?
light comes on and goes off every 2 - 5 days. not sure why, been told I have only one option, that is to change the catalytic converter.

1 Reply
copy and paste the link below.check for vacuum leaks first,engine area.. P0420 Catalyst System Efficiency Below Threshold … www.engine-codes.com/P0420.html
thank you!
your welcome.may not be vacuum leak,but gotta start somewhere.post findings.