P0139
O2 Sensor Circuit Slow Response Bank 1 Sensor 2
P0139 is an OBD-II diagnostic trouble code meaning: O2 Sensor Circuit Slow Response Bank 1 Sensor 2. Common causes: oxygen sensor malfunction, wiring harness damage. Estimated repair cost: $56–167.
Symptoms
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine Light Illuminates
Causes
- Oxygen sensor malfunction
- Wiring harness damage
- Poor contact or corrosion in connectors
- Circuit Grounding Problems
How to Fix
- Check the condition of the oxygen sensor and its connectors
- Check the integrity of the wiring harness
- Clean contacts from corrosion
- Replace the oxygen sensor if necessary
Related codes
Error P0139 by Vehicle Brand
FAQ
What does the P0139 code mean?
P0139 is an OBD-II diagnostic trouble code that indicates: O2 Sensor Circuit Slow Response Bank 1 Sensor 2
What causes a P0139 error code?
The most common causes of P0139 include: Oxygen sensor malfunction; Wiring harness damage; Poor contact or corrosion in connectors; Circuit Grounding Problems.
How do I fix a P0139 diagnostic trouble code?
To fix P0139: Check the condition of the oxygen sensor and its connectors. Check the integrity of the wiring harness. Clean contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0139?
Limited driving only, diagnose soon
How much does it cost to fix P0139?
The estimated repair cost for P0139 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat