0 like 0 dislike
351 views
by

Hesitates around 40 -45 mph changed out the 02sensors and cat still getting p0420 code

Vehicle: 2011 gmc terrian 2.4l

1 Answer

0 like 0 dislike
by (13.5k points)

Hi there,

Here is a list of possible causes for this code.

P0420 GMC - Catalyst System Low Efficiency Bank 1

Read more: https://www.autocodes.com/p0420_gmc.html

Related questions

0 like 0 dislike
1 answer 416 views
0 like 0 dislike
0 answers 280 views
asked Nov 19, 2018 by Foggy1s (101 points)
0 like 0 dislike
0 answers 181 views
0 like 0 dislike
1 answer 317 views
0 like 0 dislike
1 answer 266 views

36.2k questions

32.2k answers

1.3k comments

22.8k users

Need A Repair Shop?
Find local automotive repair shops in your area.
Does your car have Safety Recalls? → Check here
...