Help with check engine code p0420
03-19-2014, 11:37 PM
#2
The bank 1 pre-cat is not doing its job. Bank 1 is the side of the engine next to the firewall. Its possible that the downstream sensor after the pre-cat is bad, but it should throw its own code. Most likely you need a new pre-cat.
03-20-2014, 05:48 PM
#3
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Location: Bay Shore, NY
Posts: 819
http://forums.maxima.org/6th-generat...-readings.html
The lacquer thinner works. I have been doing it when I first got the code and throw a gallon in every 6 months.
The lacquer thinner works. I have been doing it when I first got the code and throw a gallon in every 6 months.
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