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P2105 OBD2: Throttle Actuator Control System - Forced Engine Shutdown

P2105 OBD2: Throttle Actuator Control System – Forced Engine Shutdown

What Does the P2105 Code Mean?

OBD-II Code P2105 is defined as a Throttle Actuator Control System – Forced Engine Shutdown. This code signifies that the vehicle’s engine control module (PCM) has detected a fault within the electronic throttle control system (ETCS), leading it to shut down engine operation for safety reasons.

What Causes the P2105 Code?

The P2105 code can stem from various issues within the throttle control system, including:

  • Accelerator Pedal Position (APP) assembly failure
  • Powertrain Control Module (PCM) failure
  • Throttle control motor failure
  • Wiring issues

What Are the Symptoms of the P2105 Code?

Drivers experiencing the P2105 code may notice one or more of the following symptoms:

  • Engine may not start
  • Loss of power during acceleration
  • Warning lights illuminated on the dashboard

How Serious Is the P2105 Code?

The P2105 code is classified as urgent due to its potential to cause severe vehicle damage or pose safety risks to the driver and passengers. Immediate action is recommended to prevent further complications.

How to Diagnose the P2105 Code

Diagnosing the P2105 code involves several steps:

  1. Use an OBD-II scanner to confirm the code and check for any additional codes.
  2. Inspect the Accelerator Pedal Position sensor and associated wiring for damage or disconnections.
  3. Test the throttle control motor for proper operation.
  4. Check the PCM for faults or software issues.

Common Repairs for the P2105 Code

Repairs for the P2105 code may include:

  • Replacing a faulty Accelerator Pedal Position assembly
  • Repairing or replacing damaged wiring
  • Replacing a malfunctioning throttle control motor
  • Reprogramming or replacing the Powertrain Control Module

How Much Does It Cost to Fix the P2105 Code?

The cost of repairing the P2105 code can vary widely based on the specific issue and the vehicle make and model. Labor and parts might range from $100 to $1,500, depending on what components need attention.

Can I Fix the P2105 Code Myself?

While some DIY enthusiasts may attempt to address the P2105 code themselves, it is crucial to understand the underlying issues fully. Given the potential risks associated with throttle control failures, consulting a professional mechanic is often advisable for a comprehensive diagnosis and repair.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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