P0136 Subaru Code - O2 Sensor Circuit Malfunction Bank 1 Sensor 2
Quick Answer
The P0136 code for Subaru vehicles indicates an O2 sensor circuit malfunction in Bank 1 Sensor 2. Common causes include Faulty O2 sensor: The most common cause of the P0136 code is a defective O2 sensor, Over time, the sensor may become contaminated with carbon buildup or fail due to normal wear and tear, Wiring issues: Damaged or frayed wiring leading to the O2 sensor can cause a malfunction in the circuit. 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 Subaru indicates O2 Sensor Circuit Malfunction Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty O2 sensor: The most common cause of the P0136 code is a defective O2 sensor, Over time, the sensor may become contaminated with carbon buildup or fail due to normal wear and tear, Wiring issues: Damaged or frayed wiring leading to the O2 sensor can cause a malfunction in the circuit.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0136 Subaru Description
The P0136 code for Subaru vehicles indicates an O2 sensor circuit malfunction in Bank 1 Sensor 2. The oxygen sensor, also known as the O2 sensor, is a crucial component in the vehicle's emissions control system. It is responsible for measuring the oxygen content in the exhaust gases and sending this information to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. Bank 1 refers to the side of the engine where the number 1 cylinder is located, and Sensor 2 indicates that it is the downstream sensor located after the catalytic converter.
Common Causes of P0136 Subaru
- Faulty O2 sensor: The most common cause of the P0136 code is a defective O2 sensor. Over time, the sensor may become contaminated with carbon buildup or fail due to normal wear and tear.
- Wiring issues: Damaged or frayed wiring leading to the O2 sensor can cause a malfunction in the circuit.
- Exhaust leaks: Leaks in the exhaust system can allow outside air to enter the system, affecting the O2 sensor's readings.
- Faulty ECM: In rare cases, a malfunctioning ECM can send incorrect signals to the O2 sensor, triggering the P0136 code.
Symptoms of P0136 Subaru
- Decreased fuel economy: A malfunctioning O2 sensor can result in poor fuel efficiency as the engine runs rich or lean.
- Rough idling: The engine may run rough or have unstable idling when the O2 sensor is not functioning correctly.
- Hesitation or stalling: The vehicle may hesitate or stall during acceleration or at idle.
- Increased emissions: A faulty O2 sensor can lead to higher emissions output, potentially causing the vehicle to fail an emissions test.
How to Fix P0136 Subaru
- Diagnose the issue: Use an OBD-II scanner to read the fault code and determine if the O2 sensor in Bank 1 Sensor 2 is the cause of the problem.
- Replace the O2 sensor: If the sensor is faulty, it will need to be replaced. Access the sensor by locating it after the catalytic converter on Bank 1 and unplug the electrical connector before removing and replacing it.
- Check wiring: Inspect the wiring leading to the O2 sensor for any damage or corrosion. Repair or replace any damaged wiring.
- Clear the code: After replacing the sensor or repairing the wiring, clear the fault code using the OBD-II scanner to reset the ECM.
- Test drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the check engine light does not reappear.
Cost to Fix P0136 Subaru
The cost to repair a P0136 code on a Subaru can vary depending on the specific model and year of the vehicle. In general, the price for a new O2 sensor can range from $50 to $200, depending on the brand and quality. Labor costs at an auto repair shop can range from $100 to $300, depending on the shop's hourly rate and the complexity of the repair. Additional costs may include diagnostic fees and any other parts or repairs needed to address the underlying issue. It's recommended to consult with a trusted mechanic or repair shop for a more accurate estimate based on the specific circumstances of the vehicle.
Tech Notes for P0136 Subaru
When is the Code Detected?
Need more information about the P0136 Subaru code?
Need more information on how to fix the P0136 Subaru code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0136 Subaru code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0136 Subaru Code
1. What are common symptoms of OBDII code P0136 in a Subaru?
- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.
2. What does the OBDII code P0136 for a Subaru indicate?
- OBDII code P0136 indicates an O2 Sensor Circuit Malfunction in Bank 1 Sensor 2, typically pointing to issues with the downstream oxygen sensor.
3. What are possible causes of the P0136 OBDII code in a Subaru?
- Possible causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine's computer system.
4. How can I diagnose the O2 sensor circuit malfunction in my Subaru related to code P0136?
- Diagnose by inspecting the oxygen sensor wiring, checking for exhaust leaks, testing the sensor's voltage output, and verifying the sensor's response to changes in air/fuel ratio.
5. Can I drive my Subaru with OBDII code P0136?
- While the car may still be drivable with this code, it is not recommended as it can lead to further damage, reduced fuel efficiency, and potential engine performance issues.
6. How do I repair the O2 sensor circuit malfunction in my Subaru triggered by code P0136?
- Repair involves replacing the Bank 1 Sensor 2 oxygen sensor, ensuring proper wiring connections, fixing any exhaust leaks, and clearing the error code.
7. Will resetting the Check Engine Light resolve the P0136 OBDII code in my Subaru?
- Resetting the Check Engine Light may temporarily clear the code, but it will likely reappear if the underlying issue causing the O2 sensor circuit malfunction is not addressed.
8. Are there any maintenance tips to prevent the recurrence of code P0136 in my Subaru?
- Regularly inspect and maintain the oxygen sensors, address any exhaust system leaks promptly, and follow the manufacturer's recommended service schedule to prevent O2 sensor circuit malfunctions.
9. How much does it cost to repair the O2 sensor circuit malfunction related to code P0136 in a Subaru?
- The cost of repair can vary depending on the cause of the issue, but it typically ranges from $200 to $500 for parts and labor.
10. Can a DIY enthusiast replace the Bank 1 Sensor 2 oxygen sensor in a Subaru to resolve code P0136?
- While it is possible for a skilled DIY enthusiast to replace the oxygen sensor, it is recommended to consult a professional mechanic to ensure proper installation and diagnosis of the issue.
Discuss the causes and fixes for P0136 Subaru OBDII Code
Code P0136 Subaru comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.