put stock pcm back in to confirm..........
p0053 sets when the pcm detects that the H02S1 heater calculated resistance is not within an expected range at engine startup for more then 1 second. Check the H02S1 circuits: high signal, low reference, heater voltage supply, heater low control. Possible failure area in the H02S1 or pcm.
P0564 sets when the ecm/pcm detects an invalid voltage signal on the cruise control set/coast and resume/accelerate switch signal circuit for greater then 1.5 seconds. Check for poor connections at the cruise control switch and ecm/pcm. Check for high resistance in the ignition 1 voltage circuit. Check for high resistance , short to voltage or ground on the cruise control set/coast and resume/accelerate switch signal circuit, located in these three areas: C277, cruise control switch, and ecm/pcm. If all circuits are ok then suspect cruise control switch or ecm/pcm
