Circuit Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. 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 2
- The accelerator pedal position (APP) sensor 1
- The manifold absolute pressure (MAP) sensor
The PCM monitors voltage on the 5-volt reference circuit. If the voltage is higher or lower than required, DTC P0651 will set.