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Engine-Codes – Generic – P0136

P0136 Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

Quick Answer

The P0136 diagnostic trouble code (DTC) indicates a problem with the Heated Oxygen Sensor (HO2S) Circuit for Bank 1 Sensor 2 in the vehicle's exhaust system. Common causes include Faulty Heated Oxygen Sensor, Damaged wiring or connectors, Exhaust leaks near the sensor. 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 indicates Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2.
Common causes
Common causes include Faulty Heated Oxygen Sensor, Damaged wiring or connectors, Exhaust leaks near the sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0136 Description

The P0136 diagnostic trouble code (DTC) indicates a problem with the Heated Oxygen Sensor (HO2S) Circuit for Bank 1 Sensor 2 in the vehicle's exhaust system. This sensor is responsible for monitoring the oxygen levels in the exhaust gases to help the engine control module (ECM) adjust the air-fuel mixture for optimal combustion efficiency. Bank 1 refers to the side of the engine where cylinder 1 is located, while Sensor 2 indicates that it is the downstream sensor, located after the catalytic converter.

OBDII Code P0136 - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2
P0136 Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

Common Causes of P0136

  1. Faulty Heated Oxygen Sensor
  2. Damaged wiring or connectors
  3. Exhaust leaks near the sensor
  4. ECM issues
  5. Contaminated sensor due to oil or coolant leaks

Symptoms of P0136

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Failed emissions test

How to Fix P0136

  1. Use an OBD-II scanner to confirm the P0136 code and diagnose the issue.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the HO2S using a multimeter to check for proper operation or replace the sensor if faulty.
  4. Clear the code and drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be needed to identify any underlying ECM issues.

Cost to Fix P0136

The cost of repairing a Heated Oxygen Sensor Circuit Malfunction (P0136) can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the parts for this repair can range from $50 to $200, while labor costs can add another $100 to $200. Keep in mind that additional diagnostics or repairs may increase the overall cost. It's recommended to consult with a professional mechanic for a more accurate estimate based on your specific vehicle.

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Code P0136 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0136 Code

1. What are common symptoms of OBDII code P0136?

- Common symptoms include poor fuel efficiency, rough idling, and the illumination of the Check Engine light.

2. What does OBDII code P0136 indicate?

- OBDII code P0136 indicates a malfunction in the heated oxygen sensor circuit for Bank 1 Sensor 2 in the vehicle's exhaust system.

3. What are possible causes of OBDII code P0136?

- Possible causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the vehicle's engine control module.

4. How can I diagnose the cause of OBDII code P0136?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the sensor's voltage.

5. Can I drive with OBDII code P0136?

- It is not recommended to drive for an extended period with this code as it can negatively impact the vehicle's performance and fuel efficiency.

6. How can I repair OBDII code P0136?

- Repair options may include replacing the oxygen sensor, repairing damaged wiring or connectors, fixing exhaust leaks, or reprogramming the engine control module.

7. How much does it cost to fix OBDII code P0136?

- The cost of repairs can vary depending on the underlying cause, but it may range from $100 to $500 or more, including parts and labor.

8. Can I reset OBDII code P0136 without fixing the issue?

- While you can clear the code temporarily, it is important to address the root cause to prevent further issues and potential damage to the vehicle.

9. How long does it take to fix OBDII code P0136?

- The repair time can vary based on the specific cause and complexity of the issue, but it may take anywhere from 30 minutes to a few hours.

10. Will OBDII code P0136 cause a vehicle to fail an emissions test?

- Yes, OBDII code P0136 typically indicates an emissions-related issue, which may cause the vehicle to fail an emissions test until the problem is resolved.

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