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P2112 Mazda Code - Throttle Actuator Control System - Stuck Closed

- Code Popularity: 16,443 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P2112 Mazda?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Throttle Body Plate Binding
  • Faulty Throttle Actuator Control (TAC) Motor
  • Throttle Actuator Control (TAC) Motor harness is open or shorted
  • Throttle Actuator Control (TAC) Motor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC P2112 Mazda?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2112 Mazda code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

Throttle valve locked during Engine Control Module (ECM) order to open

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2112 Mazda Description

The electronic Throttle Actuator Control (TAC) is a DC motor controlled by the Powertrain Control Module (PCM). There are 2 designs for the TAC, parallel and inline. The parallel design has the motor under the bore parallel to the plate shaft. The motor housing is integrated into the main housing. The inline design has a separate motor housing. An internal spring is used in both designs to return the throttle plate to a default position. The default position is typically a throttle angle of 7 to 8 degrees from the hard stop angle. The closed throttle plate hard stop prevents the throttle from binding in the bore. This hard stop setting is not adjustable and is set to result in less airflow than the minimum engine airflow required at idle. The P2112 code is set when the throttle plate is at a lower angle than commanded.

OBDII Code P2112 Mazda - Throttle Actuator Control System - Stuck Closed - AutoCodes.com
P2112 Mazda Code - Throttle Actuator Control System - Stuck Closed

Need More Information on the Code?

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Code P2112 Mazda comments

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