Ford P1127 OBD-II Trouble Code Definition: P1127 Exhaust Not Warm Enough, Downstream Sensor Not Tested P1127 Ford OBD-II Trouble CodeDescription: Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1127 OBD Code Description Exhaust Not Warm Enough, Downstream Sensor Not Tested is one of the definitions for the P1127; however your vehicle’s manufacturer may […]