P1633 FORD – Keep Alive Power Voltage Too Low

P1633 FORD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1633 FORD Possible Causes

Open Keep Alive Power (KAPWR) circuit,Faulty Powertrain Control Module (PCM)

P1633 FORD Description

Indicates that the Keep Alive Power (KAPWR) circuit has experienced a power interrupt.