AutoCodes – Audi – P0136 Audi

P0136 Audi Code - HO2S12 Sensor Range/Performance Condition

Quick Answer

The heated oxygen sensor 2 (HO2S), 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: P0136 Audi indicates HO2S12 Sensor Range/Performance Condition.
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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 12,891

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0136 Audi Description

The heated oxygen sensor 2 (HO2S), after 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 be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S 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 ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

OBDII Code P0136 Audi - HO2S12 Sensor Range/Performance Condition - AutoCodes.com — P0136 Audi Code - HO2S12 Sensor Range/Performance Condition

What does this mean?

What are the Possible Causes of the DTC P0136 Audi?

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
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0136 Audi?

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 does this mean?

Code Tech Notes

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0136 Audi 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 Audi code?

Need more information on how to fix the P0136 Audi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0136 Audi code diagnosed by a professional: Find a repair shop in your area

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 Audi Code

1. What does the OBDII code P0136 for an Audi mean?

The code P0136 indicates a HO2S12 Sensor Range/Performance Condition, specifically signaling an issue with the oxygen sensor in bank 1 sensor 2 of the vehicle.

2. What are the common symptoms of a P0136 code in an Audi?

Common symptoms of a P0136 code in an Audi may include poor fuel economy, rough idling, stalling, or a noticeable decrease in engine performance.

3. What are the potential causes of a P0136 code in an Audi?

Possible causes of a P0136 code in an Audi can include a faulty oxygen sensor, wiring or connector issues in the oxygen sensor circuit, a vacuum leak, or an exhaust system leak.

4. How can I diagnose a P0136 code in my Audi?

To diagnose a P0136 code in your Audi, you can start by visually inspecting the oxygen sensor and its wiring for any visible damage. You may also use an OBDII scanner to monitor the sensor's performance and check for any irregular readings.

5. Can I drive my Audi with a P0136 code?

It is not recommended to drive your Audi with a P0136 code for an extended period, as it can lead to poor engine performance and potential damage to the catalytic converter. It is best to address the issue promptly.

6. How do I repair a P0136 code in my Audi?

Repairing a P0136 code in your Audi typically involves replacing the oxygen sensor in bank 1 sensor 2. Ensure you use a high-quality replacement sensor and follow the manufacturer's guidelines for installation.

7. Will resetting the OBDII system clear a P0136 code in my Audi?

Resetting the OBDII system may temporarily clear the P0136 code, but if the underlying issue is not addressed, the code is likely to reappear during driving cycles. It's best to diagnose and repair the root cause of the code.

8. Can a dirty air filter trigger a P0136 code in an Audi?

While a dirty air filter can affect engine performance, it is unlikely to directly trigger a P0136 code. Focus on checking the oxygen sensor, wiring, and exhaust system components for issues related to this specific fault code.

9. Is it possible for a P0136 code in an Audi to be a false alarm?

In some rare cases, a P0136 code may be triggered by a temporary sensor malfunction or a glitch in the system. However, it is crucial to investigate the issue thoroughly to rule out any actual problems with the oxygen sensor or related components.

10. How much does it cost to fix a P0136 code in an Audi?

The cost of fixing a P0136 code in an Audi can vary depending on the root cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic. Expect costs to include parts and labor for sensor replacement or repairs.