Possible causes – Faulty Throttle Actuator Control (TAC) module– Throttle Actuator Control (TAC) module harness is open or shorted– Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires) Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No throttle response MAZDA Related P2108 code 2004 MAZDA RX8 Engine And…