Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when ECM determines voltage is out of range on VPA1 or VPA2 circuits between accelerator pedal position sensor and ECM. ECM determines the current opening angle of the accelerator pedal from these inputs and controls the throttle motor based on these signals. Possible causes are:
- Accelerator pedal position sensor circuit is open or shorted.
- Defective accelerator pedal position sensor.
- Defective ECM.