Circuit Description
WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
The powertrain control module (PCM) provides a 5-volt reference to the following sensors:
- The throttle position (TP) sensor 1
- The accelerator pedal position (APP) sensor 2
- The AC pressure sensor
- The fuel tank pressure (FTP) sensor
The PCM monitors voltage on the 5-volt reference circuit. If the voltage is higher or lower than required, DTC P0641 will set.