Power Steering Pressure Sensor
The power steering pressure sensor is mounted in steering gear and senses steering gear pressure. The sensor receives a 5-volt reference input from PCM. See Fig 1 . The sensor will provide a variable voltage output to PCM based upon steering gear line pressure. The PCM uses sensor output to extend idle speed control motor during high power steering pressure loads to help maintain a stable idle. The PCM checks output of sensor at key on and compares it to an expected value. PCM Code E040 will set if expected value is not seen at key on.