Engine-Codes.com
Engine-Codes – Mercedes-Benz – P0229 Mercedes-Benz

P0229 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent

Quick Answer

The P0229 diagnostic trouble code (DTC) for Mercedes-Benz indicates a problem with the Throttle/Pedal Position Sensor/Switch 'C' Circuit being intermittent. Common causes include Faulty throttle pedal position sensor, Loose or damaged wiring/connectors in the sensor circuit, Corrosion or contamination in the sensor connections. 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
P0229 Mercedes-Benz indicates Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent.
Common causes
Common causes include Faulty throttle pedal position sensor, Loose or damaged wiring/connectors in the sensor circuit, Corrosion or contamination in the sensor connections.
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 Aug 30, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0229 Mercedes-Benz Description

The P0229 diagnostic trouble code (DTC) for Mercedes-Benz indicates a problem with the Throttle/Pedal Position Sensor/Switch 'C' Circuit being intermittent. This means that the sensor or switch responsible for monitoring the position of the throttle pedal is not providing a consistent signal to the engine control module (ECM). The throttle pedal position sensor is crucial for the proper operation of the electronic throttle control system, as it informs the ECM of how much throttle input the driver is requesting.

OBDII Code P0229 Mercedes-Benz - Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent
P0229 Mercedes-Benz Code - Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent

Common Causes of P0229 Mercedes-Benz

  1. Faulty throttle pedal position sensor
  2. Loose or damaged wiring/connectors in the sensor circuit
  3. Corrosion or contamination in the sensor connections
  4. ECM software issues or calibration errors
  5. Mechanical issues with the throttle body

Symptoms of P0229 Mercedes-Benz

  1. Erratic acceleration
  2. Stalling or difficulty starting the engine
  3. Rough idling or engine misfires
  4. Lack of power or reduced engine performance

How to Fix P0229 Mercedes-Benz

  1. Begin by inspecting the throttle pedal position sensor and its wiring/connectors for any visible damage or loose connections.
  2. Test the sensor's output using a multimeter to check for proper voltage signals.
  3. Clean any corrosion or contamination from the sensor connections and retest.
  4. If the sensor is found to be faulty, replace it with a new one following manufacturer specifications.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0229 Mercedes-Benz

The cost of repairing a Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent issue can vary depending on the specific cause of the problem and the labor rates in your area. Generally, replacing a faulty throttle pedal position sensor can range from $100 to $300 for the part, with additional costs for labor. Overall, the total repair cost could be between $200 to $500, but it's advisable to obtain quotes from local auto repair shops for a more accurate estimate.

When is the Code Detected?

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

Need more information about the P0229 Mercedes-Benz code?

Need more information on how to fix the P0229 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0229 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 P0229 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0229 in a Mercedes-Benz related to the Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent?

Symptoms may include a lack of power or response when pressing the accelerator, erratic throttle response, and potentially the vehicle going into limp mode.

2. What are some possible causes of OBDII code P0229 in a Mercedes-Benz?

Potential causes include a faulty throttle position sensor, issues with the pedal position sensor or wiring, a malfunctioning throttle body, or a problem with the electronic control module.

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

Diagnosis typically involves using an OBDII scanner to retrieve the specific error code, checking the wiring and connectors for any damage or looseness, and testing the sensors and components involved in the throttle and pedal position system.

4. Can I continue driving my Mercedes-Benz with OBDII code P0229 present?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage or safety hazards. It's best to address the issue promptly to avoid potential complications.

5. What are some repair tips for fixing OBDII code P0229 in a Mercedes-Benz?

Repair options may include replacing the throttle position sensor, pedal position sensor, or throttle body if found to be faulty. Ensuring proper wiring connections and addressing any underlying issues should also be part of the repair process.

6. Is it possible to reset OBDII code P0229 in a Mercedes-Benz without fixing the underlying issue?

While clearing the error code temporarily may be possible, it is not a permanent solution. The underlying problem causing the code needs to be addressed to prevent it from reoccurring.

7. Can a DIY enthusiast fix OBDII code P0229 in a Mercedes-Benz, or is professional help recommended?

Depending on your skill level and experience with automotive repairs, you may be able to address the issue yourself. However, seeking professional help, especially for complex electronic components, is often recommended to ensure proper diagnosis and repair.

8. How much does it typically cost to repair OBDII code P0229 in a Mercedes-Benz?

The cost of repair can vary depending on the specific cause of the code, the parts needed, and whether professional labor is required. It's advisable to obtain quotes from reputable mechanics or service centers for an accurate estimate.

9. Are there any preventive measures to avoid encountering OBDII code P0229 in a Mercedes-Benz?

Regular maintenance, such as checking and cleaning sensors, inspecting wiring for damage, and addressing any performance issues promptly, can help prevent issues that may trigger this error code.

10. How urgent is it to address OBDII code P0229 in a Mercedes-Benz once it appears?

It is recommended to address the issue as soon as possible to prevent further damage, potential safety risks, or the vehicle going into limp mode, which can affect drivability.

Discuss the causes and fixes for P0229 Mercedes-Benz OBDII Code

Submit a New Comment

Code P0229 Mercedes-Benz comments

No comments found for this page.