AutoDiag

P2112

Throttle Actuator "A" Control System - Stuck Closed

High· Fix promptlyIntermediatePowertrainGeneric, all makes

What it means

The throttle plate is not opening when the ECU commands it.

Is it safe to drive?

Drive with caution. The engine will have little or no power.

Symptoms

  • No acceleration
  • Limp mode
  • Stalling

Probable causes

Most likely first

  1. 1Heavy carbon build-up
  2. 2Failed throttle body motor
  3. 3Wiring fault

How to diagnose it

Work through these in order before buying parts

  1. 1Record the code and its freeze frame data (speed, load, temperature when it set), then clear it and see if it comes back.
  2. 2Inspect and clean the throttle body.
  3. 3Check motor wiring and resistance.
  4. 4Check for technical service bulletins (TSBs) or software updates for your make and model; some codes have known factory fixes.

Common fixes

  • Clean or replace the throttle body

This information is general guidance for all makes. Exact causes, specifications and procedures vary by vehicle, so confirm with your service manual or a qualified mechanic before replacing parts.