OBD code information sheet
https://obdauto.ro/cod/P0139?lang=en
O2 Sensor Circuit Slow Response Bank 1 Sensor 2
Available definitions for this code
Choose the correct manufacturer. The same code can have different meanings; a definition without an identified make does not confirm applicability to your vehicle.
Imported definition with general diagnostic supplements. The code indicates an area to check, not a confirmed failed part.
Sources, methodology and limitations
- DTC Database — definiții OBD-II
Supports: code definition, community definition
- AUTODOC
Supports: symptoms, possible causes, checks, components to inspect
Checked:
- Catalogue MIT licence
General sources explain definitions and principles; they do not confirm a universal repair. Use VIN-, engine- and controller-specific service information.
How we research the information →Quick answer for this code
Priority guideCan I drive with P0139?
The code alone cannot determine whether driving is safe. The decision depends on symptoms, dashboard warnings, fluid levels, temperatures and live data.
What to check first
Test sensor electrical output and response time; inspect wiring.
Documented selection; batch last reviewed: . It does not replace diagnosis on the vehicle.
Report a problem
Technical explanation
O2 Sensor Circuit Slow Response Bank 1 Sensor 2. The supplemented diagnostic sections include their sources. This is general guidance; verify applicability to the exact vehicle.
Symptoms
- Increased consumption and uneven idle.
Possible causes
- 01Faulty oxygen sensor; damaged wiring or connectors.
Diagnostic checks
- 01Test sensor electrical output and response time; inspect wiring.
Parts involved
- Oxygen sensor, wiring and connectors (inspect).
Repair cost calculator
Indicative Romanian repair budgets, depending on the diagnosed repair. Choose your vehicle and compare available scenarios.
Model, year and engine (optional)
Available ranges are not yet validated for each year and engine code. Confirm compatible parts and access requirements with the workshop.
Display prices
Choose a make to see available repair cost scenarios.
Continue your research
Links to related systems, warning lights and vehicle examples.
Experiences with this code
User-reported cases published after moderation. Approval does not verify the diagnosis; the same code can have different causes.
No approved English experiences for this definition yet.
Similar codes
General code
Mass air flow sensor circuit malfunction
Air intake and metering
General code
Mass airflow sensor — range/performance
Air intake and metering
General code
Mass or Volume Air Flow Sensor A Circuit Low
Powertrain
