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176 Audi R8/Spyder Quick Reference Specification Book • September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0638

Throttle Actuator Control
Range/Performance (Bank 1)

• Time to open over reference
point +12%, > 0.14 Sec.
• Time to close below reference
point, +3%, > 0.56 Sec.
• Time to close below reference
point +1%, > 0.14 Sec.
• Time to close over reference
point, -1.5%, > 0.56 Sec.
• TPS 1 signal voltage, < 0.21 V
or > 0.87 V
• TPS 2 signal voltage, < 4.14 V
or > 4.84 V

P0641

Sensor Reference Voltage “A”
Circuit/Open

Internal Fault

P0642

Sensor Reference Voltage “A”
Circuit Low

Signal voltage, < 4.606-4.998 V

P0643

Sensor Reference Voltage “A”
Circuit High

Signal voltage, > 4.998-5.406 V

P0651

Sensor Reference Voltage “B”
Circuit/Open

Internal Fault

P0652

Sensor Reference Voltage “B”
Circuit Low

Signal voltage, < 4.606-4.998 V

P0653

Sensor Reference Voltage “B”
Circuit High

Signal voltage, > 4.998-5.406 V

P0657

Actuator Supply Voltage “A”
Circuit/Open

Signal voltage, > 4.4 - 5.6 V

P0658

Actuator Supply Voltage “A”
Circuit Low

Signal voltage, < 2.15 - 3.25 V

P0659

Actuator Supply Voltage “A”
Circuit High

Signal current > 1.1 A

P0685

ECM/PCM Power Relay
Control Circuit /Open

• Signal voltage, 2.6 - 3.7 V
• Sense circuit voltage, < 6 V

P0686

ECM/PCM Power Relay
Control Circuit Low

• Signal voltage, 2.6 - 3.7 V
• Sense circuit voltage, 0.7 - 1.4 A
• Sense circuit voltage, < 6 V

Audi R8/Spyder Quick Reference Specification Book • September 2013 177

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0688

ECM/PCM Power Relay
Sense Circuit /Open

Open circuit
• Sense circuit voltage, < 4.0 V
Rationality Check
• Sense circuit voltage vs. on
board voltage, > 1V
• Sense circuit voltage, > 16 V
• Sense circuit voltage vs. on
board voltage, > 2.5 V

P0697

Sensor Reference Voltage “C”
Circuit/Open

Internal Fault

P0698

Sensor Reference Voltage “C”
Circuit Low

Signal voltage, < 4.606 4.998 V

P0699

Sensor Reference Voltage “C”
Circuit High

Signal voltage, > 4.998 5.406 V

U0001

High Speed CAN
Communication Bus

CAN message, no feedback

U0001

High Speed CAN
Communication Bus

Signal check
• Bus off signal is present.

U0002

High Speed CAN
Communication Bus
Performance

Short to Ground (GND)
• Check of acknowledge bit set
by other ECU’s in the emission
frame.

U0100

Lost Communication With
ECM/PCM “A”

Signal check
• Signal message, not received

U0101

Lost Communication with TCM CAN message, No feedback

U0121

Lost Communication With
Anti-Lock Brake System
(ABS) Control Module

Signal check
• Message brake 1 or 3, not
received

U0155

Lost Communication With
Instrument Panel Cluster
(IPC) Control Module

Signal check
• Message Kombi 1 or 2, not
received

U0401

Invalid Data Received From
ECM/PCM

Signal check
• Accelerator position no signal,
≥ 102%
• DLC message, not correct

U0402

Invalid Data Received From
Transmission Control Module

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U0416

Invalid Data Rec(eived From
Vehicle Dynamics Control
Module

Signal check
• Message brake 1 or 3, not
correct

178 Audi R8/Spyder Quick Reference Specification Book • September 2013

DTC

Error Message

Malfunction Criteria and
Threshold Value

U0418

Invalid Data Received From
Brake System Control Module

Signal check
• Vehicle speed, 0 RPM
• Clutch position, closed
• Gear position, engaged
• Clutch speed, >1300 RPM
Rationality check
• Driveline speed and engine
speed, > 500 RPM
• Driveline speed and clutch
speed, > 500 RPM

U0423

Invalid Data Received From
Instrument Panel Control
Module

Signal check
• Ambient temperature, No
signal ≥ 77° C
Signal check
• Message Kombi 1 or 2, not
correct

Transmission
Error Message

Malfunction Criteria and
Threshold Value

P0805

Clutch Position Sensor Circuit

Signal check
• Vehicle speed, 5 Km/h
• Signal reference, 2000
• Time out 1, 100 ms
• Time out 2, 50 ms

P0807

Clutch Position Sensor Circuit
Low

Short to Ground (GND) Signal
Low, < 0.49 V

P0808

Clutch Position Sensor Circuit
High

Short to Battery (+) Signal High,
> 4.5 V

P0810

Clutch Position Control Error

Functional check clutch opening
time, > 2 seconds

P0841

Transmission Fluid Pressure
Sensor/Switch “A” Circuit
Range/Performance

Rationality check
• Pressure, 3 bar
• Oil volume, 20 cm3
• Pressure, 1.5 bar

P0842

Transmission Fluid Pressure
Sensor/Switch “A” Circuit Low

Short to Ground (GND) sensor
output voltage, < 0.39 V

P0843

Transmission Fluid Pressure
Sensor/Switch “A” Circuit High

Short to Battery (+) sensor
output voltage, > 4.79 V

Audi R8/Spyder Quick Reference Specification Book • September 2013 179

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0944

Hydraulic Pressure Unit Loss
of Pressure

Flow check
• Leakage if clutch commanded
open, > 120 cm3
Functional check
• Pressure increase rate, > 0.8
bar/ms
Level check
• Pressure, < 30 bar for a time of
150 ms

P0945

Hydraulic Pump Relay Circuit/
Open

Open circuit
• Driver output voltage, > 2.2 V
• Driver output voltage during
valve Off phase, < 3.2 V
Signal check
• Short to supply voltage or
open circuit. Driver output
current during valve Off phase,
< 300 mA
Level check
• Hydraulic pressure, > 65 bar

P0947

Hydraulic Pump Relay Circuit
Low

Short to Ground (GND)
• Driver output current during
valve Off phase, > 3.7 A

P0948

Hydraulic Pump Relay Circuit
High

Short to Battery (+)
• Short to supply voltage. Output
voltage during valve on phase,
> 3.2 V

P17AA Shift Valve

Short to supply voltage
• Output voltage during valve Off
phase, > 3.2 V

P17AB Shift Valve

Short to supply voltage or open
circuit
• Driver output current during
valve Off phase, < 300 mA

P17AC Gear Valve 1

Open Circuit
• Driver output voltage, > 2.2 V
• Driver output voltage during
valve Off phase, < 3.2 V

P17AD Gear Valve 1

Short to Ground (GND)
• Driver output current during
valve On phase, < 3.7 mA

180 Audi R8/Spyder Quick Reference Specification Book • September 2013

Error Message

Malfunction Criteria and
Threshold Value

P17AE Gear Valve 1

Short to supply voltage
• Output voltage during valve Off
phase, > 3.2 V

P17AF

Gear Valve 1

Short to supply voltage or open
circuit
• Driver output current during
valve Off phase, < 300 mA

P17A8

Shift Valve

Open Circuit
• Driver output voltage, > 2.2 V
• Driver output voltage during
valve Off phase, < 3.2 V

P17A9

Shift Valve

Short to Ground (GND)
• Driver output current during
valve On phase, < 3.7 mA

P17BA Clutch Position Sensor

Short to Battery (+)
• Sensor output Voltage high,
> 4.5 V

P17BB Shift Position Sensor

Rationality check
• Shift position timeout, > 245
mV for > 3 seconds

P17BC Shift Position Sensor

Short to Ground (GND)
• Sensor output Voltage low,
< 0.5 V

P17BD Shift Position Sensor

Short to Battery (+)
• Sensor output Voltage high,
> 4.5 V

P17BE Hydraulic Pump

Level check
• Pump temperature, > 120° C

P17B0

Gear Valve 2

Open Circuit
• Driver output voltage, > 2.2 V
• Driver output voltage during
valve Off phase, < 3.2 V

P17B1

Gear Valve 2

Short to Ground (GND)
• Driver output current during
valve On phase, < 3.7 mA

P17B2

Gear Valve 2

Short to supply voltage
• Output voltage during valve Off
phase, > 3.2 V

P17B3

Gear Valve 2

Short to supply voltage or open
circuit
• Driver output current during
valve Off phase, < 300 mA

Audi R8/Spyder Quick Reference Specification Book • September 2013 181

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P17B8

Clutch Position Sensor

Rationality Check
• Threshold, 3%

P17B9

Clutch Position Sensor

Short to Ground
• Sensor output Voltage low,
< 0.5 V

P172E

Gear Box

Functional check
• Gear not engaged after 1
second for 3 times
or
• Gear not disengaged after 1
second for 3 times

P1750

Power Supply (Clamp 30)

Signal range check voltage,
20%
and
• Fuel system (mult) < -15%
or
• Total mass air flow vs.
calculated mass air flow
< -20%
and
• Fuel system (mult) > 15%

P12A1

Fuel Rail Pressure Sensor,
High Pressure System