External leak on intake or exhaust side
Failed Charge Air Pressure Sensor
Failed Wastegate Regulator Valve
Engine Light ON (or Service Engine Soon Warning Light)
Charge Pressure Control Difference is the generic description for the P1550 Audi code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1550 Audi OBDII code.