Category: Audi

P0654 Audi Engine Speed Output Circuit Possible causes – Faulty Instrument Cluster– Instrument Cluster harness is open or shorted– Instrument Cluster circuit poor electrical connection– Faulty PCM What about the obd code? If the fault detection circuit senses a voltage other than what is expected, the fault line status changes causing the P0654 Audi code…

P0655 Audi Engine Hot Lamp Output Control Circuit Malfucntion Symptoms – Engine Light ON (or Service Engine Soon Warning Light) 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…

P0647 Audi Air Conditioning Clutch Relay Circuit High Possible causes – Faulty Air Conditioning Clutch Relay– Air Conditioning Clutch Relay harness is open or shorted– Air Conditioning Clutch Relay circuit poor electrical connection What about the obd code? Code P0647 Audi may be stored if an open or short exists in A/C clutch relay control…

P0648 Audi Immobilizer Lamp Control Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light) 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…

P0649 Audi Speed Control Lamp Control Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light) 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…

P0650 Audi Malfunction Indicator Lamp Control Circuit Malfunction Possible causes – Faulty Malfunction Indicator Lamp Bulb– Malfunction Indicator Lamp Bulb harness is open or shorted– Malfunction Indicator Lamp Bulb circuit poor electrical connection– Faulty Engine Control Module (ECM) What about the obd code? – An excessively high voltage is sent to Engine Control Module (ECM)…

P0651 Audi Sensor Reference Voltage B Circuit Fault Possible causes – Faulty Engine Control Module (ECM)– ECM harness is open or shorted– ECM circuit poor electrical connection– Shorted sensor on 5 volt circuit What about the obd code? The Engine Control Module (ECM) has detected the sensor 5 volt reference circuit voltage is higher or…

P0642 Audi Sensor Voltage Circuit A Low Voltage Possible causes – Faulty Engine Control Module (ECM)– ECM harness is open or shorted– ECM circuit poor electrical connection– Shorted sensor on 5 volt circuit Tech description There is a factory service bulletin for the P0642 Audi code for the following models: 2005-2007 Audi A32005-2007 Audi A42007…

P0643 Audi Sensor Reference Voltage A Circuit High Possible causes – Faulty Engine Control Module (ECM)– ECM harness is open or shorted– ECM circuit poor electrical connection– Shorted sensor on 5 volt circuit What about the obd code? The Engine Control Module (ECM) has detected the sensor 5 volt reference circuit voltage is higher than…

P0644 Audi Driver Display Serial Communication Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light) 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…

P0645 Audi Air Conditioning Clutch Relay Circuit Malfunction Possible causes – Faulty Air Conditioning Clutch Relay– Air Conditioning Clutch Relay harness is open or shorted– Air Conditioning Clutch Relay circuit poor electrical connection What about the obd code? The P0645 Audi code is stored if an open or short exists in A/C clutch relay control…

P0646 Audi Air Conditioning Clutch Relay Circuit Low Possible causes – Faulty Air Conditioning Clutch Relay– Air Conditioning Clutch Relay harness is open or shorted– Air Conditioning Clutch Relay circuit poor electrical connection What about the obd code? Code P0646 Audi may be stored if an open or short exists in A/C clutch relay control…

P0640 Audi Manifold Intake Air Heater Possible causes – Faulty Intake Air Heater– Intake Air Heater harness is open or shorted– Intake Air Heater circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0640 Audi Description The intake air (IA) heater is located in the air inlet tube and…

P0641 Audi 5 Volt Reference Voltage Incorrect Possible causes – Faulty Engine Control Module (ECM)– ECM harness is open or shorted– ECM circuit poor electrical connection– Shorted sensor on 5 volt circuit What about the obd code? The Engine Control Module (ECM) has detected the sensor 5 volt reference circuit voltage is higher or lower…

P0639 Audi Throttle Actuator Control Range/Performance Possible causes – Drive-by-wire control system malfunction– Throttle actuator malfunction– Throttle valve malfunction– PCM malfunction Tech description Dirty or clogged throttle body can triggered the P0639 Audi code. Before replacing any parts try cleaning the throttle body and reset the engine light. Symptoms – Engine Light ON (or Service…