Conditions for Setting the DTC

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 PCM detects a voltage that is higher or lower than required on the 5-volt reference circuit.
The above condition is present for longer than 1 second.