AutoCodes – Mercedes-Benz – P0152 Mercedes-Benz

P0152 Mercedes-Benz Code - O2 Sensor Circuit High Voltage Bank 2 Sensor 1

Quick Answer

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Intake air leaks may be faulty, Exhaust gas leaks. 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: P0152 Mercedes-Benz indicates O2 Sensor Circuit High Voltage Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Intake air leaks may be faulty, Exhaust gas leaks.
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 4,823

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 P0152 Mercedes-Benz Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

OBDII Code P0152 Mercedes-Benz - O2 Sensor Circuit High Voltage Bank 2 Sensor 1 - AutoCodes.com — P0152 Mercedes-Benz Code - O2 Sensor Circuit High Voltage Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0152 Mercedes-Benz?

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

How to Fix the DTC P0152 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 Front 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 P0152 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 P0152 Mercedes-Benz code?

Need more information on how to fix the P0152 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0152 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 P0152 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0152 in a Mercedes-Benz?

- Common symptoms include poor fuel economy, rough idling, engine hesitation, and potentially a Check Engine light on the dashboard.

2. What does the OBDII code P0152 for a Mercedes-Benz indicate?

- OBDII code P0152 indicates an issue with the O2 sensor circuit high voltage in Bank 2 Sensor 1 of the vehicle.

3. What are the possible causes of O2 sensor circuit high voltage in Bank 2 Sensor 1 in a Mercedes-Benz?

- Possible causes include a faulty O2 sensor, wiring issues, a vacuum leak, exhaust system leaks, or a malfunctioning engine control module (ECM).

4. How can I diagnose the O2 sensor circuit high voltage issue in my Mercedes-Benz?

- Diagnosing the issue may involve using an OBDII scanner to read the code, checking the wiring and connections to the O2 sensor, and testing the sensor itself for proper functioning.

5. Can I still drive my Mercedes-Benz with OBDII code P0152 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to decreased fuel efficiency and potential engine performance issues.

6. How can I repair OBDII code P0152 in my Mercedes-Benz?

- Repairing the issue may involve replacing the O2 sensor in Bank 2 Sensor 1, repairing any damaged wiring, fixing vacuum leaks, or addressing any other underlying causes identified during diagnosis.

7. Is it possible to reset the OBDII code P0152 in a Mercedes-Benz without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is essential to address the root cause to prevent the problem from recurring.

8. How much does it typically cost to fix OBDII code P0152 in a Mercedes-Benz?

- The cost of fixing this issue can vary depending on the specific cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any maintenance tips to prevent O2 sensor circuit high voltage issues in a Mercedes-Benz?

- Regularly servicing your vehicle, ensuring proper installation of components, and promptly addressing any warning lights or symptoms can help prevent O2 sensor circuit high voltage issues.

10. Can a DIY enthusiast fix OBDII code P0152 in a Mercedes-Benz?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to replace the O2 sensor or address wiring issues themselves. However, complex diagnostic tasks may require professional assistance.