P0136 2007 Scion xB Code - Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2
Quick Answer
The rear Heated Oxygen (HO2) sensor (bank 1 sensor 2) is located behind the Three-Way Catalytic Converter (TWC), and detects the oxygen concentration in the exhaust gas. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, EFI relay, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted. 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
- P0136 2007 Scion xB indicates Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, EFI relay, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted.
- 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 P0136 2007 Scion xB Description
What are the Possible Causes of the DTC P0136 2007 Scion xB?
- Faulty Rear Heated Oxygen Sensor Bank 1
- EFI relay
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
How to Fix the DTC P0136 2007 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 P0136 2007 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 P0136 2007 Scion xB Code
1. What does the OBDII code P0136 mean on a 2007 Scion xB?
P0136 indicates that the Engine Control Module (ECM) has detected a malfunction in the oxygen sensor circuit for Bank 1 Sensor 2, which is typically the sensor located downstream of the catalytic converter.
2. What are common symptoms of code P0136 in a 2007 Scion xB?
Symptoms of code P0136 may include a decrease in fuel efficiency, rough engine idle, a noticeable decrease in engine performance, and in some cases, an illuminated check engine light.
3. What causes code P0136 to appear on a 2007 Scion xB?
Common causes for this code include a faulty oxygen sensor, damaged or corroded sensor wiring, exhaust leaks near the sensor, or problems with the engine control module itself.
4. How can I fix the P0136 code in a 2007 Scion xB?
To fix this code, inspect and, if necessary, replace the oxygen sensor for Bank 1 Sensor 2. Also, check the wiring and connectors for damage or corrosion, and ensure there are no exhaust leaks that could affect sensor readings.
5. How do I locate Bank 1 Sensor 2 on my 2007 Scion xB?
Bank 1 refers to the side of the engine where the first cylinder is located. Sensor 2 is the oxygen sensor located downstream of the catalytic converter. In a 2007 Scion xB, it is typically found on the exhaust pipe after the catalytic converter.
6. Is it safe to drive my 2007 Scion xB with code P0136?
While you can technically still drive your vehicle, doing so with a malfunctioning oxygen sensor can lead to reduced fuel efficiency and potential long-term damage to the catalytic converter, so it is advisable to address the issue as soon as possible.
7. How urgent is it to address the P0136 code on a 2007 Scion xB?
It is moderately urgent to address this code because ignoring it can lead to more expensive repairs in the future, such as damage to the catalytic converter, and continued poor fuel economy and performance.
8. What tools are needed to diagnose and fix code P0136 on a 2007 Scion xB?
A digital multimeter and an OBDII scanner are essential tools for diagnosing P0136. You might also need basic hand tools to access and replace the oxygen sensor, depending on its location.
9. Can a faulty catalytic converter cause the P0136 code on a 2007 Scion xB?
While the catalytic converter itself does not directly cause this code, issues with it (like inefficiency or clogging) can affect the readings of the downstream oxygen sensor (Bank 1 Sensor 2), leading to the P0136 code.
10. How often should the oxygen sensors be replaced in a 2007 Scion xB?
Oxygen sensors typically have a service life of around 60,000 to 90,000 miles. However, their longevity can be affected by the overall condition of the engine and the type of fuel used. Regular checks as part of vehicle maintenance can help ensure they function properly.
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