AutoCodes – Mazda – P2112 Mazda

P2112 Mazda Code - Throttle Actuator Control System - Stuck Closed

Quick Answer

The electronic Throttle Actuator Control (TAC) is a DC motor controlled by the Powertrain Control Module (PCM). Common causes include Throttle Body Plate Binding, Faulty Throttle Actuator Control (TAC) Motor, Throttle Actuator Control (TAC) Motor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2112 Mazda indicates Throttle Actuator Control System - Stuck Closed.
Common causes: Common causes include Throttle Body Plate Binding, Faulty Throttle Actuator Control (TAC) Motor, Throttle Actuator Control (TAC) Motor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 17,342

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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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

What does this mean?

What are the Possible Causes of the DTC P2112 Mazda?

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)

How to Fix the DTC P2112 Mazda?

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

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. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2112 Mazda code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2112 Mazda Code

1. What are the common symptoms of OBDII code P2112 (Throttle Actuator Control System - Stuck Closed) on a Mazda?

- Common symptoms include reduced engine power, acceleration hesitation, and the vehicle going into limp mode.

2. What can cause the Throttle Actuator Control System to become stuck closed and trigger code P2112 on a Mazda?

- Possible causes include a malfunctioning throttle actuator, damaged wiring or connectors, or issues with the throttle body itself.

3. How serious is OBDII code P2112 (Throttle Actuator Control System - Stuck Closed) on a Mazda?

- This code should be taken seriously as it can lead to unsafe driving conditions and potential engine damage if not addressed promptly.

4. Can I still drive my Mazda with OBDII code P2112 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the engine's performance and safety systems.

5. How can I diagnose and repair OBDII code P2112 on my Mazda?

- Diagnosis typically involves checking the throttle actuator, wiring, and throttle body for any issues. Repair may involve replacing the throttle actuator or addressing wiring/connectivity problems.

6. Will resetting the OBDII code P2112 on my Mazda make the issue go away?

- Simply resetting the code may temporarily clear the warning light, but the underlying issue causing the code (such as a stuck throttle actuator) will likely persist.

7. Is it safe to continue driving if the throttle actuator is stuck closed on my Mazda?

- Continuing to drive with a stuck throttle actuator can be dangerous, as it can lead to loss of control over the vehicle's acceleration and speed.

8. Can a DIY enthusiast fix OBDII code P2112 on a Mazda, or is professional help recommended?

- While some DIY enthusiasts may have the skills to diagnose and repair this issue, it is generally recommended to seek professional help due to the complexity of the throttle control system.

9. How much does it typically cost to repair OBDII code P2112 (Throttle Actuator Control System - Stuck Closed) on a Mazda?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts replacement and labor costs, potentially ranging from a few hundred to over a thousand dollars.

10. Can regular maintenance help prevent OBDII code P2112 from occurring on my Mazda?

- While regular maintenance may not entirely prevent this specific code, keeping up with general vehicle maintenance can help ensure the proper functioning of components like the throttle actuator and throttle body, potentially reducing the risk of issues.