AutoCodes – Mercedes-Benz – P0160 Mercedes-Benz

P0160 Mercedes-Benz Code - O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2

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 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 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: P0160 Mercedes-Benz indicates O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 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.

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Code Popularity 14,087

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0160 Mercedes-Benz 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 P0160 Mercedes-Benz - O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2 - AutoCodes.com — P0160 Mercedes-Benz Code - O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0160 Mercedes-Benz?

Faulty Rear Heated Oxygen Sensor Bank 2
Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0160 Mercedes-Benz?

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 2 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0160 Mercedes-Benz 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 P0160 Mercedes-Benz code?

Need more information on how to fix the P0160 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0160 Mercedes-Benz 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 P0160 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0160 in a Mercedes-Benz?

- Common symptoms include poor fuel efficiency, rough idling, and a noticeable decrease in engine performance.

2. What does the OBDII code P0160 "O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2" mean for a Mercedes-Benz?

- This code indicates that the oxygen sensor located in Bank 2 Sensor 2 of the exhaust system is not sending any signal or data to the vehicle's engine control module.

3. What are the possible causes of OBDII code P0160 in a Mercedes-Benz?

- The most common causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine control module.

4. How can I diagnose the O2 sensor circuit issue in Bank 2 Sensor 2 of my Mercedes-Benz?

- You can use a diagnostic scanner to read the OBDII code, visually inspect the sensor and wiring for damage, and perform voltage tests to determine if the sensor is functioning properly.

5. Can I drive my Mercedes-Benz with OBDII code P0160?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage and reduced engine performance. It is best to address the issue promptly.

6. How can I repair OBDII code P0160 in my Mercedes-Benz?

- The repair typically involves replacing the oxygen sensor in Bank 2 Sensor 2, fixing any damaged wiring or connectors, and clearing the code from the engine control module.

7. Is it possible to reset the OBDII code P0160 in a Mercedes-Benz without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear until the root cause of the problem is resolved. It is important to address the issue to prevent further complications.

8. Are there any DIY tips for fixing OBDII code P0160 in a Mercedes-Benz?

- If you have the necessary tools and experience, you can attempt to replace the oxygen sensor yourself. However, it is recommended to seek professional help for proper diagnosis and repair.

9. How much does it cost to repair OBDII code P0160 in a Mercedes-Benz?

- The cost of repair can vary depending on the specific model of Mercedes-Benz, the location of the faulty sensor, and whether other components need to be replaced. It is advisable to consult a mechanic for an accurate estimate.

10. How often should the oxygen sensors be replaced in a Mercedes-Benz to prevent OBDII code P0160?

- Oxygen sensors typically last around 60,000 to 100,000 miles. It is recommended to follow the manufacturer's maintenance schedule and replace them as needed to avoid issues like OBDII code P0160.