Conditions For Setting The DTC
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
A 2.5 MPH (4 KM/H) or greater decrease in non-drive wheel speed in 0.4 seconds, and extended travel of brakelight switch or cruise release switch, indicating brakes applied and no transition noticed in the brakelight contacts of the brakelight switch.