Faulty Throttle Position Sensor
Throttle Position Sensor harness is open or shorted
Throttle Position Sensor circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Throttle Position Lower Than Expected is the generic description for the P1121 Acura code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1121 Acura OBDII code.