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HOMESERVICE MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 12 (2.0L - TURBO GENERIC SCAN TOOL - MOTRONIC FUEL INJECTION SYSTEM, IGNITION SYSTEM, ENGINE CODE: BPG)ST GENERIC SCAN TOOLDIAGNOSTIC TROUBLE CODE (DTC) TABLESSAE P0XXX-DTCSTRANSMISSION

2009 Audi A6 Base

SAE P0xxx-DTCs: Transmission

2009 Audi A6 BaseSECTION Transmission

WARNING: This page is about a different car, the 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

DTC	Error Message	Diagnostic Procedure	Monitor Strategy	Malfunction Criteria and Threshold Value	Secondary Parameters with Enable Conditions	Monitoring Time Length	Frequency of checks, MIL Illum
P0700	Transmission Control System (MIL Request)	Replace Transmission Control Module (TCM) J217 → Transmission Control Module (TCM) J217 , replacing .	Watchdog check, MC components check.	Check, failed		0 Seconds	Continuous 2 DCY
P0706	Transmission Range Sensor A Circuit Range/Performance	Check Multi-Function Transmission Range (TR) Switch F125 → Multi-Function Transmission Range (TR) Switch, checking .	Position switch check.	4 bit position code, incorrect	Sensor supply, 5.5-8 V Status, OK	0.1 Seconds	Continuous 2 DCY
P0710	Transmission Fluid Temperature Sensor A Circuit	Check ATF level: → 37 CONTROLS, HOUSING Check Transmission Fluid Temperature Sensor G93 → Transmission Fluid Temperature Sensor, checking .	Signal range check.	Sensor short circuit: U_sensor (+), 2.3 u+ 2.7 v U_sensor (-), 2.3 u- 2.7 v		1.5 Seconds	Continuous 2 DCY
P0711	Transmission Fluid Temperature Sensor A Circuit Range/Performance	Check ATF level: → 37 CONTROLS, HOUSING Check Transmission Fluid Temperature Sensor G93 → Transmission Fluid Temperature Sensor, checking .	Rationality check.	Discontinual temperature: ATF temperature delta T between 2 measurements, >20°C Sensor stuck: Comparison ATF vs. chip temperature, ATF temp. must follow chip temp. in certain ranges, 20-40°C	Temperature fault, no other fault detected Chip temperature, status OK Engine speed or input speed, > 400 RPM Signal status, OK	1.5 Seconds	Continuous 2 DCY
P0712	Transmission Fluid Temperature Sensor A Circuit Low	Check ATF level: → 37 CONTROLS, HOUSING Check Transmission Fluid Temperature Sensor G93 → Transmission Fluid Temperature Sensor, checking .	Signal range check.	Circuit low: U_sensor (+), 4.5 V U_sensor (-), 0.5 V		1.5 Seconds	Continuous 2 DCY
P0713	Transmission Fluid Temperature Sensor A Circuit High	Check ATF level: → 37 CONTROLS, HOUSING Check Transmission Fluid Temperature Sensor G93 → Transmission Fluid Temperature Sensor, checking .	Signal range check.	Circuit high: U_sensor (+), > 4.5 V U_sensor (-), > 0.5 V		1.5 Seconds	Continuous 2 DCY
P0714	Transmission Fluid Temperature Sensor A Circuit Intermittent	Check ATF level: → 37 CONTROLS, HOUSING Check Transmission Fluid Temperature Sensor G93 → Transmission Fluid Temperature Sensor, checking .	Signal range check.	Circuit high: U_sensor (+), > 4.5 V U_sensor (-), 0.5 V		1.5 Seconds	Continuous 2 DCY
P0716	Input/Turbine Speed Sensor A Circuit Range/Performance	Check Transmission Input Speed (RPM) Sensor G182 → Sensor for transmission RPM, checking .	Rationality check.	Signal higher or lower than threshold Higher, > + 8000 RPM Lower, 20 RPM	Higher: Sensor supply, OK Sensor, no electrical error Lower: Sensor supply, OK Engine speed, >600 RPM Status engine speed, OK Output speed, >500 RPM Status output speed, OK or substitute value Range position, OK or substitute value Sensor, no electrical error Transmission condition, friction-locked Error flag fnabvra_err, not set	0.6 Seconds	Continuous 2 DCY
P0717	Input/Turbine Speed Sensor A Circuit No Signal	Check Transmission Input Speed (RPM) Sensor G182 → Sensor for transmission RPM, checking .	Short to Ground (GND) Short to Battery (+) Open circuit	Hardware detection	Sensor supply, OK	0.6 Seconds	Continuous 2 DCY
P0721	Output Speed Sensor Circuit Range/Performance	Check Transmission Output Speed (RPM) Sensor G195 → Sensor for transmission output RPM, checking .	Rationality check.	Signal> threshold, > 1000 RPM Difference between last and actual value >threshold, -1000 RPM Difference to wheel speeds, > 500 RPM and input speed, > 200 RPM	Sensor supply, OK Sensor, no electrical error Transmission condition, friction-locked Input speed sensor, OK Difference between output speed and input speed, > 200 RPM Transmission condition, friction-locked backwards or forwards Shift flag, = 0 (no shift) Input speed, OK Sensor supply, OK Wheel speeds, OK	0.8 Seconds 1 Second	2 DCY 2 DCY
P0722	Output Speed Sensor Circuit No Signal	Check Transmission Output Speed (RPM) Sensor G195 → Sensor for transmission output RPM, checking .	Short to Ground (GND) Short to Battery (+) Open circuit	Hardware detection	Sensor supply, OK	0.6 Seconds	Continuous 2 DCY
P0727	Engine Speed Input Circuit No Signal	Check wiring connection Between Engine Control Module (ECM) J623 and the Transmission Control Module (TCM) J217 according to wiring diagrams Check Engine Speed (RPM) Sensor G28 → Engine Speed (RPM) Sensor G28 , checking .	Rationality check.	CAN message signal error flag, =1	Ignition, on CAN Bus, OK DME CAN connection, OK	1 Second	Continuous Immediate
P0729	Gear 6 Incorrect Ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 100; 1400; 8150 RPM Input speed, speed difference 200; 200 RPM	Transmission oil temp, > -20°C Forward gear (1 to 6), activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0731	Gear 1 Incorrect Ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 0; 250; 2000 RPM Input speed, speed difference 500; 200; 200 RPM	Transmission oil temp, > -20°C Forward gear (1 to 6), activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0732	Gear 2 Incorrect Ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 0; 400; 3500 RPM Input speed, speed difference 300; 200; 200 RPM	Transmission oil temp, > -20°C Forward gear (1 to 6), activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0733	Gear 3 Incorrect Ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 100; 650; 5500 RPM Input speed, speed difference 200; 200; 200 RPM	Transmission oil temp, > -20°C Forward gear (1 to 6), activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0734	Gear 4 Incorrect Ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 100; 850; 7500 RPM Input speed, speed difference 200; 200; 200 RPM	Transmission oil temp, > -20°C Forward gear (1 to 6), activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0735	Gear 5 Incorrect Ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 100; 1100; 8150 RPM Input speed, speed difference 200; 200; 200 RPM	Transmission oil temp, > -20°C Forward gear (1 to 6), activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0736	Reverse Incorrect ratio	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking . Mechanical malfunction in transmission	Rationality check.	Speed difference between Output speed, > characteristic speed difference = f (output speed), output speed 100; 250; 2000 RPM Input speed, speed difference 500; 500; 300 RPM	Transmission oil temp, > -20°C Reverse gear, activated Output speed, > 0 RPM Engine speed, >550 RPM Input speed, > 300 RPM Input speed, OK Stand by control, inactive Time after gear switch, 0.2 s	3 Symptoms	Continuous 2 DCY
P0741	Torque Converter Clutch Circuit Performance or Stuck Off	Check Engine Speed (RPM) Sensor G28 → Engine Speed (RPM) Sensor G28 , checking . Check Transmission Input Speed (RPM) Sensor G182 → Sensor for transmission RPM, checking Check Automatic Transmission Pressure Regulating Valve 6 N371 → Pressure regulator valves, checking .	Rationality check.	Rate of (setting of nominal value) - actual value, > 50 RPM	Status of clutch, closed or closed loop control	15 Seconds	Continuous 2 DCY
P0746	Pressure Control Solenoid 'A Performance or Stuck Off	Check Automatic Transmission Pressure Regulating Valve 1 N215 → Pressure regulator valves, checking .	Short to Ground (GND)/open circuit.	PWM hardware detection, 0 or 100%	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0747	Pressure Control Solenoid 'A Stuck On	Check Automatic Transmission Pressure Regulating Valve 1 N215 → Pressure regulator valves, checking .	Short to Battery (+).	PWM hardware detection, 0 or 100%	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0748	Pressure Control Solenoid 'A Electrical	Check Automatic Transmission Pressure Regulating Valve 1 N215 → Pressure regulator valves, checking .	Rationality check.	Current higher or lower than threshold, > (50 + 170) mA	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0751	Shift Solenoid A Performance or Stuck Off	Check Solenoid Valve 1 N88 → Solenoid valve 1, checking .	Short to Ground (GND) Open circuit	If PWM = 0%, diagnosis by ASIC If 0% = PWM , 7.6% voltage return lead (low), 0.15 V If 7.6% = PWM , 92.4% voltage return lead (high), 0.15 V If 7.6% = PWM , 92.4% voltage return lead (low), 0.15 V	High side FET voltage drop, = 1 V High side FET, enabled Low side FET, enabled	0.05 Seconds	Continuous 2 DCY
P0752	Shift Solenoid Stuck On	Check Solenoid Valve 1 N88 → Solenoid valve 1, checking .	Short to Battery (+).	If PWM = 100%, diagnosis by ASIC If 7.6% = PWM = 100% voltage return lead (high), >0.3 V	High side FET voltage drop, = 1 V High side FET, enabled Low side FET, enabled	0.05 Seconds	Continuous 2 DCY
P0776	Pressure Control Solenoid B Performance or Stuck Off	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking .	Short to Ground (GND).	PWM hardware detection, 0 or 100%	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0777	Pressure Control Solenoid B Stuck On	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking .	Short to Battery (+)/open circuit.	PWM hardware detection, 0 or 100%	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0778	Pressure Control Solenoid B Electrical	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking .	Rationality check.	Current higher or lower than threshold, (850 - 120) mA	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0781	1-2 Shift	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 1-2A Fault detection during gear changes 1-2B	Input speed - output speed> threshold, > 500 RPM Input speed - output speed x ratio (0)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=300 RPM Depending on monitoring function procedure: monitoring function A: at x detected symptoms. Refer to DTC Monitoring function B: at y detected symptom . Refer to DTC	>=5	Continuous 2 DCY
P0781	Load control	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 2-1B	Input speed - output speed> threshold Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=250 RPM	>=5	Continuous 2 DCY
P0782	2-3 Shift	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 2-3A Fault detection during gear changes 2-3B	Input speed - output speed> threshold, > 500 RPM Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=300 RPM Depending on monitoring function procedure: monitoring function A:at x detected symptoms. Refer to DTC Monitoring function B: at y detected symptom . Refer to DTC	>=5	Continuous 2 DCY
P0782	Load control	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 3-2B	Input speed - output speed> threshold Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=500 RPM	>=5	Continuous 2 DCY
P0783	3-4 Shift	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 3-4A Fault detection during gear changes 3-4B	Input speed - output speed> threshold, > 500 RPM Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=300 RPM Depending on monitoring function procedure: monitoring function A:at x detected symptoms. Refer to DTC Monitoring function B: at y detected symptom . Refer to DTC	>=5	Continuous 2 DCY
P0783	Load control	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 4-3B	Input speed - output speed> threshold Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=700 RPM	>=5	Continuous 2 DCY
P0784	4-5 Shift	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 4-5A Fault detection during gear changes 4-5B	Input speed - output speed> threshold, > 500 RPM Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=300 RPM Depending on monitoring function procedure: monitoring function A:at x detected symptoms. Refer to DTC Monitoring function B: at y detected symptom . Refer to DTC	>=5	Continuous 2 DCY
P0784	Load control	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 5-4B	Input speed - output speed> threshold Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=1200 RPM	>=5	Continuous 2 DCY
P0796	Pressure Control Solenoid C Performance or Stuck Off	Check Automatic Transmission Pressure Regulating Valve 3 N217 → Pressure regulator valves, checking .	Short to Ground (GND)/open circuit.	PWM hardware detection, 0 or 100%	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0797	Pressure Control Solenoid C Stuck On	Check Automatic Transmission Pressure Regulating Valve 3 N217 → Pressure regulator valves, checking .	Short to Battery (+).	PWM hardware detection, 0 or 100%	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0798	Pressure Control Solenoid C Electrical	Check Automatic Transmission Pressure Regulating Valve 3 N217 → Pressure regulator valves, checking .	Rationality check.	Current higher or lower than threshold, > (50 + 170) mA	Low side and high side FET, activated Power supply, > 9 V Voltage drop at FET, = 1 V Solenoid supply, > 9 V	0.05 Seconds	Continuous 2 DCY
P0829	Load control	Check ATF level: → 37 CONTROLS, HOUSING Check pressure regulator valves → Pressure regulator valves, checking . Mechanical malfunction in transmission	Fault detection during gear changes 6-5B	Input speed - output speed> threshold Input speed - output speed x ratio (t)- Input speed - output speed x ratio (0) threshold , -30 calculated value 30 RPM	Transmission oil temperature, > =- 10°C Engine speed, >=600RPM Range position, no P,R,N Output speed, >=1800 RPM	>=5	Continuous 2 DCY
P0889	TCM Power Relay Sense Circuit Range/Performance	Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking .	Rationality check.	FET drive, not possible	Filtered battery voltage, > 7 V High side and low side FET, enabled Status counter initialization, 0 or 1	0.03 Seconds	Continuous 2 DCY
P0890	TCM Power Relay Sense Circuit Low	Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking .	Short to Ground (GND).	Solenoid power supply voltage, 5.5 V Drop voltage over high side FET, > 0.1 V	Filtered battery voltage, > 7 V High side and low side FET, enabled Status counter initialization, 0 or 1	0.03 Seconds	Continuous 2 DCY
P0891	TCM Power Relay Sense Circuit High	Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking .	Short to Battery (+).	Hardware detection	Filtered battery voltage, > 7 V High side and low side FET, enabled Status counter initialization, 0 or 1	0.03 Seconds	Continuous 2 DCY
P0892	TCM Power Relay Sense Circuit Intermittent	Check pressure regulator valves → Pressure regulator valves, checking . Check Solenoid Valve 1 N88 → Solenoid valve 1, checking .	Open circuit.	Hardware detection	Filtered battery voltage, > 7 V High side and low side FET, enabled Status counter initialization, 0 or 1	0.03 Seconds	Continuous 2 DCY

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.