Error code

OBD2 P2112

OBD2P2112
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle Actuator Control System - Stuck Closed.

Severity

moderateCan be driven but may experience performance issues and could become unsafe if the problem worsens.

Summary

P2112 indicates that the throttle actuator control system is stuck closed or malfunctioning, affecting how the throttle responds to the gas pedal.

Symptoms

  • Check engine light
  • Difficulties starting the vehicle
  • Misfiring
  • Rough idle
  • General lack of power
  • Extreme lack of power
  • Unresponsive throttle
  • Stalling

Common Causes

  • Throttle body actuator stuck or tight/sticking
  • Wiring harness issues (short to positive, short to ground)
  • TP sensor malfunction
  • ECM issue

Diagnosis

  1. Compare any other stored or pending codes to identify related components.
  2. Inspect throttle body for carbon fouling causing excess resistance.
  3. Check wiring harness for broken, frayed wires or physical damage.

Fixes

  • Clean the throttle body if it is carbon fouled.
  • Replace faulty sensors or wiring harness as needed.

FAQ

How serious is P2112?

P2112 should be taken seriously. If the vehicle shows driving issues, you may end up stranded.

What are common mistakes when repairing P2112?

Automatically replacing sensors or the entire throttle body without proper diagnosis can lead to unnecessary expenses.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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