P1228 INFINITI Possible Causes
- Faulty Accelerator Pedal Position (APP) Sensor
- Accelerator Pedal Position (APP) Sensor Harness is Open or Shorted
- Poor Electrical Connection in the Accelerator Pedal Position (APP) Sensor Circuit
How to Fix Code P1228 INFINITI?
Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
When is the Code Detected?
An excessively high voltage from the Accelerator Pedal Position (APP) Sensor 2 is sent to the Engine Control Module (ECM).
Possible Symptoms
- Check Engine Light On (or Service Engine Soon Warning Light)
P1228 INFINITI Meaning
The Accelerator Pedal Position (APP) Sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the throttle position and sends a signal to the Engine Control Module (ECM).
The Accelerator Pedal Position Sensor has two sensors. These sensors are a type of potentiometer that convert the accelerator pedal position into an output voltage and send the voltage signal to the ECM.
Additionally, these sensors detect the opening and closing speed of the accelerator pedal and transmit the voltage signals to the ECM. The ECM evaluates the current opening angle of the accelerator pedal from these signals and controls the throttle actuator motor based on these signals.
The idle position of the accelerator pedal is determined by the ECM receiving the signal from the Accelerator Pedal Position Sensor. The ECM uses this signal for engine operation, such as fuel cut-off.