AutoCodes – MINI – P0136 MINI

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

Quick Answer

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1, Heated Oxygen Sensor 2 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 MINI indicates Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2.
Common causes
Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1, Heated Oxygen Sensor 2 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.
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Code Popularity 3,957
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 31, 2021
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Code P0136 MINI Description

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air-fuel mixture (air-fuel ratio) must maintain near the ideal stoichiometric ratio. The HO2S2 output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Powertrain Control Module (PCM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S2 generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The PCM interprets Lean when the HO2S2 voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The PCM interprets Rich when the HO2S2 voltage is above 0.45 V. The P0136 code will set when the PCM detects that the HO2S2 signal voltage is out of range for an extended period.
OBDII Code P0136 MINI - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 - AutoCodes.com
P0136 MINI Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

What are the Possible Causes of the DTC P0136 MINI?

  • Exhaust gas leaks
  • Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1
  • Heated Oxygen Sensor 2 Bank 1 harness is open or shorted
  • Heated Oxygen Sensor 2 Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors

How to Fix the DTC P0136 MINI?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0136 MINI 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.

Need more information about the P0136 MINI code?

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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 MINI Code

1. What are common symptoms of OBDII code P0136 in a MINI related to the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2?

- Common symptoms include decreased fuel efficiency, rough idling, engine hesitation, and an illuminated check engine light.

2. What are the possible causes of OBDII code P0136 in a MINI indicating a Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2?

- The code may be triggered by a faulty oxygen sensor, damaged wiring or connectors, an exhaust leak, or issues with the engine's air-fuel mixture.

3. How can I diagnose the cause of OBDII code P0136 in a MINI for the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2?

- Use an OBDII scanner to retrieve the specific fault code, visually inspect the sensor and its connections, check for exhaust leaks, and perform voltage tests on the sensor.

4. Is it safe to continue driving my MINI with OBDII code P0136 related to the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2?

- While the car may still be driveable, it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

5. Can a DIY enthusiast repair OBDII code P0136 in a MINI associated with the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2?

- Depending on the cause, DIY repairs may be possible such as replacing the oxygen sensor or repairing damaged wiring. However, more complex issues may require professional assistance.

6. How much does it typically cost to repair OBDII code P0136 in a MINI due to a Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2?

- The cost of repair can vary widely based on the specific cause, with expenses ranging from $100 for a DIY oxygen sensor replacement to $500 or more for professional diagnostics and repairs.

7. Are there any preventive maintenance tips to avoid encountering OBDII code P0136 linked to the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 in a MINI?

- Regularly servicing your vehicle, addressing any engine performance issues promptly, and ensuring proper fuel quality can help prevent sensor malfunctions and related codes.

8. How long does it take to repair OBDII code P0136 associated with the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 in a MINI?

- The repair time can vary based on the cause and complexity of the issue, with simple sensor replacements taking around 1-2 hours and more involved repairs potentially requiring a full day.

9. Can a faulty Heated Oxygen Sensor Bank 1 Sensor 2 cause other OBDII codes to be triggered in a MINI?

- Yes, a malfunctioning oxygen sensor can affect the air-fuel mixture and emissions control system, potentially leading to the triggering of additional codes related to engine performance and efficiency.

10. Will resetting the check engine light resolve OBDII code P0136 associated with the Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 in a MINI?

- Simply resetting the light will not fix the underlying issue causing the code. It is important to diagnose and address the root cause to prevent the code from reappearing.

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