DTC P2128: Accelerator Position Sensor 2 Signal Circuit High Input: General Description

The Accelerator Position Sensor (APS) is a very important sensor which controls the fuel amount by transmitting the driver's accelerating intention to the PCM. The Accelerator Position Sensor (APS) is divided into Accelerator Position Sensor (APS) 1, 2 because its reliability is important. The Accelerator Position Sensor (APS) 1, 2 are composed with the independent power and ground. Accelerator Position Sensor (APS) 2 shows the 1/2 output of the Accelerator Position Sensor (APS) 1 and decides the fault if the ratio of Accelerator Position Sensor (APS) 1, 2 is different. When the Accelerator Position Sensor (APS) 1 is out of order, the signal of Accelerator Position Sensor (APS) 2 can be substituted instead of APS 1 and vise versa.