GMC Sierra
P0135
The GMC Sierra T1XX (2019-Present) is experiencing a check engine light illumination accompanied by trouble code P0135, indicating an issue with the oxygen sensor circuit.
4 SolutionsP-CodePowertrain
P
Error Code Type
Powertrain
Components
1 affected
Exhaust System
Symptoms
9 common
- •Check engine light illuminated
- •Poor fuel economy
- •Rough idle
- +6 more
Most Affected Generations
1 generation
T1XX
4
Top Affected Components
1 component
Exhaust System
4
Severity Levels
1 level
medium
4
Quick Facts
4
Total Solutions
1
Affected Components
9
Common Symptoms
1
Generations
All Solutions
Showing 4 of 4 solutions for error code P0135 across all generations.