I see from the list in Tech that 0573 is the "Brake Switch 1 High"

What does this mean? What should I look for?

Thanks guys,

Hondo

 

What it is telling you is that the power level to the brake light switch is in excess of 8 volts.

The brake light switch does not directly actuate the brake lights, but tells the PCM to do a number of functions, one of which is to actuate the brake light.

The most frequent cause is a broken filament grounding across to a hot lead on a tail light circuit. This is most often in a trailer brake.

If it is not something simple like that, then you wil need to have it scanned and may have a problem with the ECM or one of the relays.