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2000 Nissan Sentra 1.8L with a code P0430 CAT.?

Source: Yahoo! Answers

I have been having this code for 2 years, I erase it but it comes back. The O2 sensor seem to be ok (it is swiching) I do not see any drivibility problems. I would like to know what could be the problem, The car has 75 000 miles. What would be the best way to diagnose the... Read More

  • Sentra has twin cats located vertically in front the engine. So there are two banks P0420 CLY 1&3 bank 2 CLY 2&4 P0430.Failure codes. Cat converter bottom O2 sensors should not switch like the top sensors. Complex and troublesome you will need to replace the cats one piece and if the bottom sensors get stuck you will... Read More
  • 1.try checking spark plugs or replacing them. 2. check air filter. 3. put fuel injector cleaner in the tank 4. put super unleaded in the tank. 5. reset code.

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