Volvo XC90
P0138
The P0138 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the upstream oxygen sensor (O2 sensor) in your 2015-2024 Volvo XC90. This typically points to an issue with the oxygen sensor or the related circuitry.
1 SolutionP-CodePowertrain
P
Error Code Type
Powertrain
Components
1 affected
Exhaust System
Symptoms
6 common
- •Check engine light illuminated
- •Poor fuel economy
- •Rough idle or stalling
- +3 more
Most Affected Generations
1 generation
SPA
1
Top Affected Components
1 component
Exhaust System
1
Severity Levels
1 level
medium
1
Quick Facts
1
Total Solutions
1
Affected Components
6
Common Symptoms
1
Generations
All Solutions
Showing 1 of 1 solution for error code P0138 across all generations.