P0139 Scion Code - Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2
Quick Answer
The P0139 code for a Scion indicates an issue with the Oxygen Sensor Circuit Slow Response for Bank 1 Sensor 2. Common causes include Faulty oxygen sensor, Wiring issues, Exhaust leaks. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0139 Scion indicates Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty oxygen sensor, Wiring issues, Exhaust leaks.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P0139 Scion Description
The P0139 code for a Scion indicates an issue with the Oxygen Sensor Circuit Slow Response for Bank 1 Sensor 2. This means that the oxygen sensor located downstream of the catalytic converter on the side of the engine with cylinder 1 is not responding as quickly as it should. The oxygen sensor is responsible for measuring the amount of oxygen in the exhaust gases and sending this information to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. A slow response from the oxygen sensor can lead to poor engine performance, decreased fuel efficiency, and increased emissions.
Common Causes of P0139 Scion
- Faulty oxygen sensor
- Wiring issues
- Exhaust leaks
- ECM malfunction
- Poor quality fuel
Symptoms of P0139 Scion
- Rough idling
- Hesitation during acceleration
- Decreased fuel efficiency
- Check Engine Light illuminated
- Increased emissions
How to Fix P0139 Scion
- Diagnose the issue by using a scan tool to pinpoint the exact cause of the slow response from the oxygen sensor.
- Inspect the wiring and connections to the oxygen sensor for any damage or corrosion. Repair or replace as necessary.
- Check for exhaust leaks near the oxygen sensor and repair them to ensure proper operation.
- Replace the oxygen sensor if it is determined to be faulty.
- Clear the code and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0139 Scion
The cost of repairing a P0139 code can vary depending on the cause of the issue and the labor rates in your area. Typically, the cost of replacing an oxygen sensor ranges from $100 to $300, including parts and labor. Additional costs may be incurred if wiring repairs or other components need to be replaced. It's recommended to consult with a qualified mechanic to get an accurate estimate based on your specific vehicle and location.
Tech Notes for P0139 Scion
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Information for Specific Scion Models
- P0139 2005 Scion xB — Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2006 Scion xB — Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2007 Scion xB — Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2
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