Have 2001 GMC sierra with 5.3 engine and it was made canada. I have checked and on 2001 GMC Sierra 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
only found 2 O2 sensors on exhaust. replaced both and still getting p0140 error code? Does canadian trucks only have 2 sensors?
(3) Answers
| |
You'll have 4 sensors total. 2 before (upstream) the catalytic converters and 2 after (downstream.) Another site said it was the MAF...Do some more homework.
| |
This code sounds like it's indicating the second sensor on bank one.
apparently someone has emptied out your catylic converters. That's why you can't clear the code.
Qualified Local GMC Shops
Qualified GMC Shops For This Repair