Tego una camioneta GMC 2003 tiene un problema que al momento de ir en marcha al acelerar pierde fuerza el motor y se prende una senal que dice REDUCED IGNITION POWER, que problema puede ser, gracias

replaced the wiring harness to the throttle body... No Good. I then cleaned all the ground wires from the battery to the firewall... No Good. I checked the amount of juice in the battery and it was good charging and off. Then I cleaned the throttle body with a cleaner and... Still No Good. Finally I did the last check and changed the throttle body itself because the throttle sensor is riveted to the throttle body ok