Cold Start “B” Camshaft
Position Timing OverAdvanced

Malfunction Criteria and
Threshold Value
Target error
• Difference between target
position vs. actual position
> 10.00 to 22.00° CRK

Control Module and Output Signals
DTC

Error Message

Malfunction Criteria and
Threshold Value

P0601

Internal Control Module
Memory Check Sum Error

Internal check sum, incorrect

P0602

Control Module Programming
Error

Reprogramming not completed

P0604

Internal Control Module
Random Access Memory
(RAM) Error

Write ability check, failed

P0605

Internal Control Module Read
Only Memory (ROM) Error

Check failed

P0606

ECM/PCM Processor

• Internal check failure
• SPI communications check
Identifier failure

P06D1

CM/PCM Processor

• Internal check failure
• SPI communications check
Identifier failure

P0613

TCM Processor

Check-calculation of 1st CPU
failed, Single reset does not
cover problem

P0614

ECM / TCM Incompatible

Detection of error signal

P062B

Injector Valves
Communication CPU

SPI communications check
Identifier not active / correct

P0638

Throttle Actuator Control
Range/Performance Bank 1

Rationality check close
movement
• Time to close reference point
> 0.6 Sec.
and
• Reference point 2.88%.
Signal range check @
mechanical stop low
• TPS 1 signal voltage < 0.40 ;
> 0.8V
or
• TPS 2 signal voltage < 4.20;
> 4.6V

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 315

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0639

Throttle Actuator Control
Range/Performance Bank 2

• Duty cycle > 80%
and
• ECM power stage No Failure
• Deviation throttle valve angles
vs. calculated values > 4-50%

P0641

Sensor Reference Voltage “A”
Circuit/Open

Internal Fault
• Signal voltage deviation
> ± 0.3 V

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 to
5.406 V

P0651

Sensor Reference Voltage “B”
Circuit/Open

Internal Fault
• Signal voltage deviation
> ± 0.3 V

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 < 6 V

P0687

ECM/PCM Power Relay
Control Circuit High

• Signal current > 0.7 - 1.4 A
• Sense circuit voltage < 6.0 V

P0688

ECM/PCM Power Relay
Sense Circuit /Open

Sense voltage < 4.0 V

P0697

Sensor Reference Voltage C
Circuit/Open

Internal Fault
• Signal voltage deviation > +/0.3 V

P0698

Sensor Reference Voltage “C”
Circuit Low

Signal voltage < 4.606 - 4.998 V

P0699

Sensor Reference Voltage “C”
Circuit High

5V supply voltage > 4.998 5.406 V

316 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Error Message

Malfunction Criteria and
Threshold Value

U0001

High Speed CAN
Communication Bus

CAN message, no feedback

U0002

High Speed CAN
Communication Bus
Performance

Global timeout receiving no
message

U0037

Vehicle Communication Bus B

Internal CAN failure

U0100

Lost Communication With
ECM/PCM “A”

CAN communication check
(Master-/Slave-BUS) CAN
message triggered received no
feedback

U0101

Lost Communication with TCM No CAN message received from
TCM no feedback

U0115

Lost Communication With
ECM/PCM “B”

CAN communication check
(Master-/Slave-BUS) CAN
message triggered received no
feedback

U0121

CAN ABS Brake Unit

Lost Communication With
Anti-Lock Brake System (ABS)
Control, time-out

U0140

CAN Communication with
Body Control Module

CAN communication with Body
Control Module time out, no
message

U0146

Lost Communication With
Gateway “A”

Received CAN message no
message

U0155

Lost Communication With
Instrument Panel Cluster
(IPC) Control Module

Received CAN message no
message

U0301

CAN: Master/SlaveCommunication

Software Incompatibility With
ECM/PCM implausible message

U0302

Software Incompatibility with
Transmission Control Module

Software Incompatibility With
TMC implausible message

U0322

Software Incompatibility with
Body Control Module

Temperature received from CAN
≤ -50

U0323

Communication with Body
Control Module

Ambient temperature value
(module not encoded for
ambient temperature sensor) =
FDh

U0401

CAN (only slave)

Communication on private CAN
failed

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 317

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

U0402

Invalid Data Received From
Transmission Control Module

Invalid data received from TCM

U0415

Vehicle Speed

• Out of range high
• Speed sensor signal:
initialization error
• Speed sensor signal: low
voltage error
• Speed sensor signal: sensor
error
• CAN communication with
BSCM implausible message

U0422

CAN: Ambient Air Temperature Ambient temperature value
Sensor
(initialization) = FEh

U0423

CAN: Instrument cluster

Received data implausible
message

U0447

Invalid Data Received From
Gateway "A"

Received data from Gateway
implausible message

U1103

Production mode active

Vehicle in production mode

DTC

Error Message

Transmission
Malfunction Criteria and
Threshold Value

P0705

Transmission Range Sensor
“A” Circuit Malfunction
(PRNDL Input)

-

P0706

Transmission Range
Sensor “A” Circuit Range/
Performance

4 bit position code, incorrect

P0707

Transmission Range Sensor
Circuit Low

-

P0708

Transmission Range Sensor
Circuit High

-

P0710

Transmission Fluid
Temperature Sensor Circuit

Sensor short circuit:
• U_sensor (+), and U_sensor
(-) diagnosis by ASIC

318 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0711

Transmission Fluid
Temperature Sensor “A”
Circuit Range/Performance

Discontinual temperature:
• ATF temperature delta T
between 2 measurements,
>20° C
Sensor stuck:
• Comparision ATF vs. chip
temperature, ATF temp. must
follow chip temp. in certain
ranges, 25 - 40° C

P0712

Transmission Fluid
Temperature Sensor “A”
Circuit Low

Circuit low:
• U_sensor (+), and U_sensor
(-) diagnosis by ASIC

P0713

Transmission Fluid
Temperature Sensor “A”
Circuit High

Circuit high:
• U_sensor (+), and U_sensor
(-) diagnosis by ASIC

P0714

Transmission Fluid
Temperature Sensor “A”
Circuit Intermittent

Circuit high:
• U_sensor (+), and U_sensor
(-) diagnosis by ASIC

P0716

Input/Turbine Speed
Sensor “A” Circuit Range/
Performance

Signal higher or lower than
threshold
• Higher, > + 8000 RPM
• Lower, < 20 RPM

P0717

Input/Turbine Speed Sensor
“A” Circuit No Signal

Hardware detection

P0721

Output Speed Sensor Circuit
Range/Performance

• Signal > threshold,
> 10000 RPM
• Difference between last and
actual value > threshold,
-1000 RPM
• Difference to wheel speeds,
> 500 RPM and input speed,
> 200 RPM

P0722

Output Speed Sensor Circuit
No Signal

Hardware detection

P0727

Engine Speed Input Circuit No
Signal

CAN message signal error flag,
=1

P0741

Torque Converter Clutch
Circuit Performance or Stuck
Off

Rate of (setting of nominal
value) - actual value, > 50 RPM

P0746