2005 Nissan Titan, P0420 P0430

Question

I have a 2005 Nissan Titan LE, 5.6L V8. I have engine codes that came up P0430 and P0420. They also repeat twice. What do they mean.

Answer 1

It means that you need new catalytic converter. You could try clearing the codes first and use high octane gas, but it very possible that the catalytic conver are already damage.

Comments

I thought it might be the catalytic converts. Why are those codes coming up twice for each one? Should I replace the oxygen senors as well as the converter?