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P0220 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction

Quick Answer

The P0220 diagnostic trouble code for Mercedes-Benz indicates a Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the circuit, ECM malfunction. 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
P0220 Mercedes-Benz indicates Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction.
Common causes
Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0220 Mercedes-Benz Description

The P0220 diagnostic trouble code for Mercedes-Benz indicates a Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction. This code is specifically related to the throttle position sensor, which is a crucial component in the vehicle's electronic throttle control system. The throttle position sensor (TPS) is responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate amount of air and fuel to deliver to the engine for optimal performance.

OBDII Code P0220 Mercedes-Benz - Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction
P0220 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction

Common Causes of P0220 Mercedes-Benz

  1. Faulty throttle position sensor
  2. Damaged wiring or connectors in the circuit
  3. ECM malfunction
  4. Corrosion or debris affecting sensor operation
  5. Electrical issues such as short circuits or open circuits

Symptoms of P0220 Mercedes-Benz

  1. Hesitation or jerking during acceleration
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated
  5. Limp mode activated

How to Fix P0220 Mercedes-Benz

  1. Begin by conducting a thorough diagnostic scan to confirm the P0220 code and identify the specific cause of the malfunction.
  2. Inspect the wiring and connectors related to the throttle position sensor for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the throttle position sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Clear the diagnostic trouble codes from the ECM and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0220 Mercedes-Benz

The typical repair costs for addressing a Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction (P0220) can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

When is the Code Detected?

An unexpected voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

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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 P0220 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0220 in a Mercedes-Benz related to the Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction?

- Common symptoms include loss of power, engine stalling, rough idling, and issues with acceleration response.

2. What are the possible causes of OBDII code P0220 in a Mercedes-Benz?

- The code P0220 can be triggered by a faulty throttle position sensor, damaged wiring or connectors, or issues with the electronic throttle control system.

3. How can I diagnose the Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction in my Mercedes-Benz?

- Use a diagnostic scanner to retrieve the specific OBDII code, inspect the throttle position sensor and related wiring for damage, and perform a voltage test to check the sensor's functionality.

4. Can driving with the OBDII code P0220 in a Mercedes-Benz cause further damage?

- Continuing to drive with this code can potentially lead to poor engine performance, decreased fuel efficiency, and even further damage to the throttle control system.

5. How can I repair the Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction in my Mercedes-Benz?

- Repair options include replacing the faulty throttle position sensor, repairing damaged wiring or connectors, or resetting the electronic throttle control system.

6. Is it safe to continue driving my Mercedes-Benz with the throttle position sensor issue?

- It is not recommended to drive your vehicle with a faulty throttle position sensor, as it can affect the engine's performance and potentially lead to unsafe driving conditions.

7. Can I reset the OBDII code P0220 in my Mercedes-Benz without fixing the underlying issue?

- While you can clear the code using a diagnostic scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring and causing further issues.

8. How much does it typically cost to repair the Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction in a Mercedes-Benz?

- The cost of repair can vary depending on the extent of the damage and the specific components that need replacement, but it typically ranges from $200 to $500.

9. Are there any preventive maintenance tips to avoid encountering the OBDII code P0220 in a Mercedes-Benz?

- Regularly inspecting and cleaning the throttle position sensor, as well as performing routine maintenance on the electronic throttle control system, can help prevent issues that trigger this code.

10. Can a DIY enthusiast fix the Throttle/Pedal Position Sensor/Switch 'B' Circuit Malfunction in a Mercedes-Benz?

- While some experienced DIYers may be able to handle the repair, it is recommended to consult a professional mechanic, especially when dealing with sensitive electronic components like the throttle position sensor.

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