P1128 INFINITI Possible Causes
- Faulty throttle control motor
- Throttle control motor harness is open or shorted
- Poor electrical connection in throttle control motor circuit
How to Fix P1128 INFINITI Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
When is the Code Detected?
The Engine Control Module (ECM) detects short circuits between the ECM and the throttle control motor.
Possible Symptoms
- Check Engine Light on (or Service Engine Soon warning light)
P1128 INFINITI Meaning
The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the throttle control motor to make the throttle valve opening angle correctly in response to driving conditions.