AutoCodes – Mercedes-Benz – P0501 Mercedes-Benz

P0501 Mercedes-Benz Code - Vehicle Speed Sensor 'A' Range/Performance

Quick Answer

The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. Common causes include Faulty Vehicle Speed Sensor, Vehicle speed sensor harness or connectors is open or shorted, Vehicle speed sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0501 Mercedes-Benz indicates Vehicle Speed Sensor 'A' Range/Performance.
Common causes: Common causes include Faulty Vehicle Speed Sensor, Vehicle speed sensor harness or connectors is open or shorted, Vehicle speed sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 9,873

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 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
Cost to Diagnose
FAQs
Comments
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Code P0501 Mercedes-Benz Description

The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the Engine Control Module (ECM). The ECM determines the vehicle speed based on the frequency of these pulse signals.

OBDII Code P0501 Mercedes-Benz - Vehicle Speed Sensor 'A' Range/Performance - AutoCodes.com — P0501 Mercedes-Benz Code - Vehicle Speed Sensor 'A' Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0501 Mercedes-Benz?

Faulty Vehicle Speed Sensor
Vehicle speed sensor harness or connectors is open or shorted
Vehicle speed sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0501 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0501 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 P0501 Mercedes-Benz code?

Need more information on how to fix the P0501 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0501 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 P0501 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0501 in a Mercedes-Benz related to the Vehicle Speed Sensor 'A' Range/Performance issue?

- Common symptoms include erratic speedometer readings, incorrect or fluctuating speedometer readings, and potential issues with the vehicle's transmission shifting.

2. What are the possible causes of OBDII code P0501 in a Mercedes-Benz?

- The code P0501 typically indicates a problem with the vehicle speed sensor, such as a faulty speed sensor, damaged wiring harness, or connection issues.

3. How can a faulty vehicle speed sensor affect the performance of a Mercedes-Benz?

- A faulty vehicle speed sensor can lead to inaccurate speed readings, affecting the vehicle's shifting patterns, fuel efficiency, and overall drivability.

4. What steps can be taken to diagnose the OBDII code P0501 in a Mercedes-Benz?

- Diagnostic steps include checking the speed sensor for damage, inspecting the wiring harness for any issues, and using a scan tool to read live data related to vehicle speed.

5. Is it safe to continue driving a Mercedes-Benz with the OBDII code P0501 present?

- It is generally not recommended to drive the vehicle with the P0501 code present, as it can lead to transmission issues and potential safety hazards due to inaccurate speed readings.

6. How can the Vehicle Speed Sensor 'A' Range/Performance issue be repaired in a Mercedes-Benz?

- Repair options include replacing the faulty speed sensor, repairing any damaged wiring, and clearing the code with a diagnostic tool.

7. Can a DIY enthusiast fix the OBDII code P0501 in a Mercedes-Benz?

- Depending on the skill level and experience of the individual, a DIY enthusiast may be able to replace the speed sensor or inspect the wiring harness, but professional diagnosis and repair are recommended for more complex issues.

8. Are there any preventative measures to avoid encountering the OBDII code P0501 in a Mercedes-Benz?

- Regular vehicle maintenance, such as checking the speed sensor and wiring during scheduled services, can help prevent issues that may trigger the P0501 code.

9. How long does it typically take to repair the Vehicle Speed Sensor 'A' Range/Performance issue in a Mercedes-Benz?

- The repair time can vary depending on the exact cause of the issue, but replacing a speed sensor or repairing wiring typically takes a few hours at a professional repair shop.

10. Can the OBDII code P0501 be triggered intermittently in a Mercedes-Benz?

- Yes, the P0501 code can sometimes be triggered intermittently, especially if the issue with the speed sensor or wiring connection is sporadic. It is important to address the underlying problem to prevent further complications.