P0138 2006 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 2006 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 2006 Scion xB Description
What are the Possible Causes of the DTC P0138 2006 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 2006 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 2006 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 2006 Scion xB Code
1. What does OBDII code P0138 for a 2006 Scion xB mean?
The code P0138 indicates a high voltage condition in the oxygen sensor circuit of Bank 1 Sensor 2 in a 2006 Scion xB.
2. What are common symptoms of a P0138 code in a 2006 Scion xB?
Common symptoms of a P0138 code may include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.
3. What can cause the P0138 code to appear in a 2006 Scion xB?
The P0138 code in a 2006 Scion xB is often triggered by issues such as a faulty oxygen sensor, wiring problems, exhaust leaks, or a malfunctioning engine control module (ECM).
4. How can I diagnose a P0138 code in my 2006 Scion xB?
To diagnose a P0138 code, you can use an OBDII scanner to retrieve the code and then inspect the oxygen sensor, wiring connections, and exhaust system for any visible damage or issues.
5. Can I drive my 2006 Scion xB with a P0138 code?
It is not recommended to drive your 2006 Scion xB with a P0138 code, as it can lead to poor engine performance and potentially cause further damage to the vehicle.
6. How do I repair a P0138 code on my 2006 Scion xB?
To repair a P0138 code, you may need to replace the Bank 1 Sensor 2 oxygen sensor, repair any damaged wiring, fix exhaust leaks, or reprogram the ECM if necessary.
7. How much does it cost to fix a P0138 code in a 2006 Scion xB?
The cost to fix a P0138 code in a 2006 Scion xB can vary depending on the root cause of the issue, but it may range from $100 to $400 for parts and labor.
8. Can a P0138 code be triggered by a loose gas cap on a 2006 Scion xB?
While a loose gas cap can trigger some other codes, it is unlikely to cause a P0138 code. The P0138 code specifically relates to the oxygen sensor circuit.
9. How often should the oxygen sensors be replaced in a 2006 Scion xB?
Oxygen sensors in a 2006 Scion xB typically last around 100,000 miles, but it is recommended to follow the manufacturer's maintenance schedule for inspection and replacement.
10. Will resetting the error codes make the P0138 code disappear on a 2006 Scion xB?
Resetting the error codes may temporarily clear the Check Engine Light, but the P0138 code will reappear if the underlying issue is not addressed.
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