Notifications
Clear all
0
31/12/2020 6:11 pm
Topic starter
2010 GMC Acadia, 12,000 miles on remanufactured engine
After replacing catalytic converter‘s, oxygen sensors are showing wild variations. Does the below data indicate bad sensors or another problem? Car is showing no trouble codes whatsoever. Thanks!
1 Answer
0
31/12/2020 6:27 pm
Forget about fuel trim as in this kind of repair it does not help.
Bank 1 - sensor 1 is showing wild variations as thats NORMAL
Bank 1 - sensor 2 is showing no activity which is NOT NORMAL.
What you need to do next is to swap the O2 sensors on Bank 1 to see that you did not get a defective O2 sensor. If the graphs stay the same then it means the O2's are working...if the graphs swapped places..one of your O2's is defective.
Also you did not note the error CODES in your post.
