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P2112 OBD2: Throttle Actuator Control System - Stuck Closed

P2112 OBD2: Throttle Actuator Control System – Stuck Closed

What Does the P2112 Code Mean?

OBD-II Code P2112 is defined as a Throttle Actuator Control System – Stuck Closed. This code indicates that the throttle actuator is unable to open or close properly, which can significantly impact engine performance.

What Causes the P2112 Code?

The P2112 code can be triggered by several issues, including:

  • Powertrain Control Module (PCM) failure
  • Throttle body assembly failure
  • Throttle control motor failure
  • Wiring issues related to the throttle control system

What Are the Symptoms of the P2112 Code?

Common symptoms associated with the P2112 code include:

  • Decreased engine performance
  • Engine may enter limp home mode, resulting in reduced power output

How Serious Is the P2112 Code?

The P2112 code is classified as urgent. It indicates significant malfunctions that can lead to severe vehicle damage or pose safety risks to the driver and passengers. Immediate attention is recommended.

How to Diagnose the P2112 Code

Diagnosing the P2112 code involves several steps:

  1. Use an OBD-II scanner to confirm the presence of the P2112 code.
  2. Inspect the throttle body assembly and wiring for visible damage or disconnections.
  3. Check the PCM for any faults or malfunctions.
  4. Test the throttle control motor and its operation.

Common Repairs for the P2112 Code

Repair options for the P2112 code may include:

  • Replacing the throttle body assembly
  • Repairing or replacing damaged wiring
  • Replacing the throttle control motor
  • Repairing or replacing the PCM if found defective

How Much Does It Cost to Fix the P2112 Code?

The cost to fix the P2112 code can vary widely based on the specific issue:

  • Throttle body replacement can range from $300 to $800.
  • Wiring repairs may cost between $100 and $300.
  • PCM replacement can exceed $1,000 depending on the make and model of the vehicle.

Can I Fix the P2112 Code Myself?

While it is possible to address some issues related to the P2112 code yourself, such as checking for wiring problems or cleaning the throttle body, most repairs will require professional diagnostic tools and expertise, especially if the PCM is involved. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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