Conditions for Running the DTC

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

P0502

DTC P0503 is not set.
TP sensor angle is greater than 8%.
Engine is running.
Ignition voltage is between 9-32 V.
Engine speed is between 1,500-6,500 RPM.
Engine torque is greater than 54 N.m (40 lb ft).

P0503

Ignition voltage is between 9-32 V.
Engine speed is between 200-7,500 RPM for 5 s.
Transmission output shaft speed change is less than 124 RPM for 5 s.