My check engine light came on with the p0420

2007 NISSAN MAXIMA
110,000 MILES • 6 CYL • AUTOMATIC
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DWILLS817
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  • 2 POSTS
Sometimes the gear is not shifting and it jumps while driving
Mar 13, 2016 at 2:37 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 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
Mar 14, 2016 at 3:24 PM
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