Possible causes

– Throttle Body Plate Binding
– Faulty Throttle Actuator
– Throttle Actuator harness is open or shorted
– Throttle Actuator circuit poor electrical connection

When is the code detected?

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

Symptoms

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

P2112 MAZDA Description

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve using gears. The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM to control the throttle actuator and set the throttle valve angle in response to driver inputs.

MAZDA Technical Service Bulletins for P2112 code