Circuit Description
WARNING: This page is about a different car, the 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
The powertrain control module (PCM) uses the 5-volt reference circuit as a sensor feed to the following sensors:
- The A/C pressure sensor
- The throttle position (TP) sensor 1
- The accelerator pedal position (APP) sensor 2
- The fuel tank pressure (FTP) sensor
- The supercharge inlet pressure (SCIP) sensor
- The barometric pressure (BARO) sensor
- The camshaft position (CMP) sensor
The PCM monitors the voltage on the 5-volt reference circuit. If the voltage is out of tolerance, the PCM will set DTC P0641.