Trouble codes 33 and 51

1991 NISSAN MAXIMA
180,000 MILES • 3.0L • 6 CYL • FWD • AUTOMATIC
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BLANCA LOPEZ
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I understand both codes I got from my ECM but which of the two should I check? Is there any chance that my only problem could be the O2 sensor and not any of my fuel injectors? My car shakes like crazy and after 2,000 rpm's car jerks and does not want to speed up.
Aug 18, 2017 at 2:39 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Hi,

It sounds like you have a misfire have you tuned it up lately? This will cause both codes for the O2.

Here is a guide that will help you get started:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Please let us know what happens so it will help others.

Cheers, Ken
Aug 18, 2017 at 3:12 PM
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BLANCA LOPEZ
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  • 13 POSTS
So far I have done spark plugs and oil filter. The link takes me no where. How do I check my car for a misfire? Thank you for the reply!
Aug 19, 2017 at 5:40 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Sorry try the link again, I fixed it.
Aug 20, 2017 at 2:23 PM
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