My check engine light came on with the P0420

Tiny
DWILLS817
  • MEMBER
  • 2007 NISSAN MAXIMA
  • 6 CYL
  • AUTOMATIC
  • 110,000 MILES
Sometimes the gear is not shifting and it jumps while driving
Sunday, March 13th, 2016 AT 2:37 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,949 POSTS
The code is for catalytic converter below threshold, so if the cat is broken this can cause this problem, check out information step 6. This shows what can happen,

http://ww.2carpros.com/articles/engine-has-low-power-output

Here is how you would change it, not the same car, but the procedure is very similar.

https://www.2carpros.com/articles/catalytic-converter-replacement

Let me know what you find so it can help others
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Monday, March 14th, 2016 AT 3:24 PM

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