P0138 2005 Scion xB Code - Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2
Quick Answer
The Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection. 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
- P0138 2005 Scion xB indicates Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection.
- 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.
Code P0138 2005 Scion xB Description
What are the Possible Causes of the DTC P0138 2005 Scion xB?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Intake air leaks
- Exhaust gas leaks
- Inappropriate fuel pressure
- Faulty fuel injectors
How to Fix the DTC P0138 2005 Scion xB?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0138 2005 Scion xB code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0138 2005 Scion xB Code
1. What are the common symptoms of OBDII code P0138 on a 2005 Scion xB?
- Common symptoms include decreased fuel efficiency, engine hesitation, rough idling, and an illuminated Check Engine light.
2. What does the OBDII code P0138 "Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2" mean for a 2005 Scion xB?
- This code indicates that the oxygen sensor located downstream (after the catalytic converter) on bank 1 is detecting a high voltage condition.
3. What are the possible causes of OBDII code P0138 on a 2005 Scion xB?
- Common causes include a faulty oxygen sensor, wiring issues in the oxygen sensor circuit, exhaust leaks, or a failing catalytic converter.
4. How can I diagnose the OBDII code P0138 on my 2005 Scion xB?
- Diagnosing this code typically involves using an OBDII scanner to read the code, checking the oxygen sensor's voltage output, inspecting the sensor's wiring, and looking for exhaust leaks.
5. Can I continue to drive my 2005 Scion xB with the OBDII code P0138?
- It is not recommended to drive for an extended period with this code as it can lead to decreased fuel efficiency and potentially cause damage to the catalytic converter.
6. How can I repair OBDII code P0138 on a 2005 Scion xB?
- Repair options may include replacing the oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or replacing the catalytic converter if necessary.
7. Is it possible to reset the Check Engine light after fixing OBDII code P0138 on a 2005 Scion xB?
- Yes, once the underlying issue has been addressed and the fault codes cleared, the Check Engine light can be reset using an OBDII scanner.
8. Are there any preventative maintenance tips to avoid OBDII code P0138 on a 2005 Scion xB?
- Regularly inspecting and replacing the oxygen sensors as part of routine maintenance can help prevent issues that lead to this code.
9. Can extreme weather conditions affect the likelihood of OBDII code P0138 appearing on a 2005 Scion xB?
- Yes, extreme temperatures or harsh driving conditions can potentially impact the performance of the oxygen sensor and contribute to the occurrence of this code.
10. How long does it typically take to repair OBDII code P0138 on a 2005 Scion xB?
- The repair time can vary depending on the exact cause of the code, but it may take anywhere from 1 to 3 hours to diagnose and fix the issue.
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