No acceleration, loud noise

Tiny
KARRIEB
  • MEMBER
  • 2015 NISSAN SENTRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 150,000 MILES
A year ago, my car suddenly started to get jerky and lose acceleration. Check engine light was on. Brought it to a shop and code said faulty mass airflow. This was replaced and the same thing happened. Brought it back and they replaced it again saying it was a faulty sensor. Same thing happened and this shop said to bring it to the dealer where they could recalibrate it. This was done and the same issues happened. Brought it back to the dealer and they replaced the back O2 sensor. Same issues. Brought it back to the dealer and they looked it over and said I needed to replace the catalytic converter. I have not done this yet and am getting the bank1 O2 sensor replaced today. The check engine light has been on the entire time. Help!
Wednesday, November 6th, 2024 AT 8:27 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,320 POSTS
Can you please give me the trouble code numbers? Also, what is the loud noise? Can you upload a short video of the noise so I can hear it?

There are two catalytic converters, which one did they replace? I need more information to help you. If the primary catalytic is bad it will cause all of these problems BTW. Here is what I am talking about. Check out the images (below). Please let us know what happens.
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Wednesday, November 6th, 2024 AT 10:39 AM

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