P1127 Audi ECTS Actuator Power Source Circuit Malfunction
Possible causes
– Faulty Electronic Throttle Control System (ETCS) Actuator
– Electronic Throttle Control System (ETCS) Actuator harness is open or shorted
– Electronic Throttle Control System (ETCS) Actuator circuit poor electrical connection
– Electronic Throttle Control System (ETCS) Actuator harness is open or shorted
– Electronic Throttle Control System (ETCS) Actuator circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1127 Audi Description
Battery positive voltage is supplied to terminal +BM of the Engine Control Module (ECM) even once when the ignition switch is OFF for the electric Electronic Throttle Control System (ETCS) control system.
If the P1127 Audi code is stored, the ECM shuts down the power for the ETCS motor and the magnetic clutch, and the ETCS valve is fully closed by the return spring.
However, the opening angle of the ETCS valve can be controlled by the accelerator pedal through the ETCS cable.
Audi Vehicle:Audi A1,Audi A3,Audi A1,Audi A3,Audi A1,Audi A3,Audi A4,Audi A5,Audi Q3,Audi A5,Audi Q5,Audi A3,Audi A4,Audi A5,Audi TT,Audi Q3,Audi Q5,Audi S3,Audi TTS,Audi RS 3,Audi TT RS,Audi A7,Audi Q7,Audi A8,Audi A6,Audi S4,Audi S5,Audi Q5,Audi S6,Audi S8,Audi S5,Audi A8,Audi R8 V8,Audi RS 5,Audi S6,Audi R8 V10,Audi R8 GT,Audi A8L