Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2006 Mazda MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE

DTC P2112: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P2112)

DTC P2112

Throttle actuator control system range/performance problem

DETECTION CONDITION

The PCM monitors the throttle actuator control duty ratio when the engine is running. If the duty ratio is more than 95% , the PCM determines that there is a throttle actuator control system range/performance problem.

Diagnostic support note

This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
PENDING CODE is available if the PCM detects the above malfunction conditions.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Throttle actuator control module malfunction

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.