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P2112 Mercedes-Benz Code - Throttle Actuator 'A' Control System Stuck Closed

Quick Answer

The P2112 diagnostic trouble code for Mercedes-Benz indicates an issue with the Throttle Actuator 'A' Control System being stuck closed. Common causes include Faulty throttle actuator motor, Dirty or clogged throttle body, Wiring issues or electrical faults. 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
P2112 Mercedes-Benz indicates Throttle Actuator 'A' Control System Stuck Closed.
Common causes
Common causes include Faulty throttle actuator motor, Dirty or clogged throttle body, Wiring issues or electrical faults.
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 09, 2024
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Code P2112 Mercedes-Benz Description

The P2112 diagnostic trouble code for Mercedes-Benz indicates an issue with the Throttle Actuator 'A' Control System being stuck closed. The throttle actuator is responsible for controlling the amount of air entering the engine, which is essential for proper combustion and engine performance. When the throttle actuator is stuck closed, it means that the throttle plate is not opening properly, leading to a restricted airflow into the engine. This can result in poor engine performance, reduced power, rough idling, and potentially stalling.

OBDII Code P2112 Mercedes-Benz - Throttle Actuator 'A' Control System Stuck Closed
P2112 Mercedes-Benz Code - Throttle Actuator 'A' Control System Stuck Closed

Common Causes of P2112 Mercedes-Benz

  1. Faulty throttle actuator motor
  2. Dirty or clogged throttle body
  3. Wiring issues or electrical faults
  4. ECM malfunction
  5. Mechanical obstruction in the throttle system

Symptoms of P2112 Mercedes-Benz

  1. Reduced engine power
  2. Rough idling or surging
  3. Stalling or difficulty starting
  4. Check engine light illuminated
  5. Limited throttle response

How to Fix P2112 Mercedes-Benz

  1. Diagnose the issue using a scan tool to confirm the P2112 code and check for any other related codes.
  2. Inspect the throttle actuator motor, throttle body, and wiring for any visible damage or signs of wear.
  3. Clean the throttle body and throttle plate to ensure proper airflow.
  4. Test the throttle actuator motor and wiring for proper operation and voltage.
  5. Replace any faulty components such as the throttle actuator motor, throttle body, or ECM if necessary.

Cost to Fix P2112 Mercedes-Benz

The typical repair costs for resolving a P2112 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of parts for replacing a throttle actuator motor or throttle body can range from $200 to $600, while the labor costs can be between $100 to $300. Overall, the total repair cost for addressing a Throttle Actuator 'A' Control System Stuck Closed issue could range from $300 to $900. It's recommended to consult with a professional mechanic to get an accurate estimate based on the specific vehicle make and model.

What does this mean?

Tech Notes for P2112 Mercedes-Benz

Mercedes Benz Code = 0190 (Throttle valve actuator): Mechanical fault (P2112)

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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 P2112 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P2112 in a Mercedes-Benz related to the Throttle Actuator 'A' Control System Stuck Closed?

- Common symptoms include reduced engine power, poor acceleration, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P2112 in a Mercedes-Benz indicating a Throttle Actuator 'A' Control System Stuck Closed?

- Possible causes can include a faulty throttle actuator, wiring issues, a malfunctioning throttle body, or a problem with the electronic control unit (ECU).

3. How can I diagnose OBDII code P2112 in my Mercedes-Benz related to the Throttle Actuator 'A' Control System Stuck Closed?

- Diagnosis typically involves using a diagnostic scanner to retrieve the fault code, conducting a visual inspection of the throttle components, and testing the throttle actuator for proper function.

4. Is it safe to continue driving my Mercedes-Benz with OBDII code P2112 indicating a Throttle Actuator 'A' Control System Stuck Closed?

- It's not recommended to drive the vehicle with this issue as it can lead to further damage and safety concerns. It's best to have the problem diagnosed and repaired promptly.

5. Can OBDII code P2112 in a Mercedes-Benz be reset to see if it returns, or does it require immediate attention?

- While you can try resetting the code to see if it reappears, it's important to address the underlying issue causing the code to prevent potential engine and drivability problems.

6. How much does it typically cost to repair OBDII code P2112 in a Mercedes-Benz due to the Throttle Actuator 'A' Control System Stuck Closed?

- Repair costs can vary depending on the specific cause of the issue, but it's recommended to budget for potential expenses related to replacing the throttle actuator, throttle body, or addressing wiring faults.

7. Are there any DIY tips for fixing OBDII code P2112 in a Mercedes-Benz indicating a Throttle Actuator 'A' Control System Stuck Closed?

- DIY repairs for this issue can be challenging due to the complexity of the throttle system. It's often best to seek professional help to accurately diagnose and repair the problem.

8. Can a Mercedes-Benz dealership or an independent mechanic effectively address OBDII code P2112 linked to the Throttle Actuator 'A' Control System Stuck Closed?

- Both a Mercedes-Benz dealership and a reputable independent mechanic with experience in Mercedes vehicles should be able to diagnose and repair this issue effectively.

9. Will OBDII code P2112 in a Mercedes-Benz reset on its own after a certain number of driving cycles?

- The code may clear on its own after several successful driving cycles if the underlying issue has been resolved. However, it's still recommended to have the system checked to prevent future occurrences.

10. Does OBDII code P2112 in a Mercedes-Benz always mean that the Throttle Actuator 'A' Control System is physically stuck closed?

- While the code indicates a problem with the throttle actuator control system being stuck closed, it may not always be a physical obstruction. It could also indicate an electrical or sensor-related issue.

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