Pressure Control Solenoid “A”
Performance or Stuck Off

PWM hardware detection, 0 or
100%

P0747

Pressure Control Solenoid “A”
Stuck On

PWM hardware detection, 0 or
100%

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 319

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0748

Pressure Control Solenoid “A”
Electrical

• Current higher or lower than
threshold, > 220 mA
• EDS output voltage at short to
ground or open circuit
~ 0.5 V smaller than EDS
supply voltage
• Static leakage current flow

P0751

Shift Solenoid “A”
Performance or Stuck Off

• If PWM = 0%, diagnosis by
ASIC
• If 0% ≤ PWM , 7.6% voltage
return lead (low), < 0.75 V
• If 7.6% ≤ PWM , 92.4% voltage
return lead (high), < 0.75 V
• If 7.6% ≤ PWM , 92.4% voltage
return lead (low), < 0.75 V

P0752

Shift Solenoid Stuck On

• If PWM = 100%, diagnosis by
ASIC
• If 7.6% ≤ PWM ≤ 100% voltage
return lead (high), > 0.3 V

P0754

Shift Solenoid “A” Intermittent

• If PWM = 0%, diagnosis by
ASIC
• If 0% ≤ PWM , 7.6% voltage
return lead (low), < 0.75 V
• If 7.6% ≤ PWM , 92.4% voltage
return lead (high), < 0.75 V
• If 7.6% ≤ PWM , 92.4% voltage
return lead (low), < 0.75 V

P0776

Pressure Control Solenoid “B”
Performance or Stuck off

PWM hardware detection, 0 or
100%

P0777

Pressure Control Solenoid “B”
Stuck On

PWM hardware detection, 0 or
100%

P0778

Pressure Control Solenoid “B”
Electrical

• Current higher or lower than
threshold, < 730 mA
• EDS output voltage at short to
ground or open circuit
~ 0.5 V smaller than EDS
supply voltage
• Static leakage current flow

P0796

Pressure Control Solenoid “C”
Performance or Stuck off

PWM hardware detection, 0 or
100%

P0797

Pressure Control Solenoid “C”
Stuck On

PWM hardware detection, 0 or
100%

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

Error Message

Malfunction Criteria and
Threshold Value

P0798

Pressure Control Solenoid “C”
Electrical

• Current higher or lower than
threshold, > 220 mA
• DS output voltage at short to
ground or open circuit
~ 0.5 V smaller than EDS
supply voltage
• Static leakage current flow

P0889

TCM Power Relay Sense
Circuit Range/Performance

FET drive, not possible

P0890

TCM Power Relay Sense
Circuit Low

• Solenoid power supply voltage,
< 1.4 V
• Drop voltage over high side
FET, > 1 V

P0891

TCM Power Relay Sense
Circuit High

Hardware detection

P0892

TCM Power Relay Sense
Circuit Intermittent

Hardware detection

P1702

Impossible Combination of
Substitute Functions or Not
Allowed Actuating of Valves

SW functions: actuating
solenoid valves colliding with 2
substitute functions with same
priority as driven solenoid valves
that have short circuit to supply
or interruption

P2637

Torque Management
Feedback Signal “A”

CAN message signal error flag,
=1

P2714

Pressure Control Solenoid “D”
Performance or Stuck Off

PWM hardware detection, 0 or
100%

P2715

Pressure Control Solenoid “D”
Stuck On

PWM hardware detection, 0 or
100%

P2716

Pressure Control Solenoid “D”
Electrical

• Current higher or lower than
threshold, < 730 mA
• EDS output voltage at short to
ground or open circuit ~ 0,5
V smaller than EDS supply
voltage
• Static leakage current flow

P2723

Pressure Control Solenoid “E”
Performance or Stuck Off

PWM hardware detection, 0 or
100%

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 321

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2725

Pressure Control Solenoid “E”
Electrical

• Current higher or lower than
threshold, 20 mm
• Misfire failure

P1009

Air Mass Meter 1/2
Implausible Signal From Load
Detection (Via throttle position
and engine speed map)

• Mass air flow HFM2 vs. lower
threshold map HFM2 < 0 450 kg/h
• Mass air flow HFM2 vs. upper
threshold map > 55 - 1082

P106A

Plausibility with fuel system Bank 2 Intake Manifold
Pressure/Air Mass Throttle load survey below threshold
• Load calculation < -35%
Valve Angle Deviation

P1073

2 MAF Sensors MAF 1 MAF 2

MAF sensor signal < 66 uSec

P1074

2 MAF Sensors MAF 1 MAF 2

• MAF sensor signal
> 1100 uSec
or
• MAF sensor signal temp
correction < 65 mSec

P1081

Exhaust Bank 3, Mixture
Adaptation Range 1 Lean
Limit Not Reached

Adaptive value > 6.00%

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

Error Message

Malfunction Criteria and
Threshold Value

P1082

Exhaust Bank 3, Mixture
Adaptation Range 2 Lean
Limit Not Reached

Adaptive value > 30%

P1083

Exhaust Bank 3, Mixture
Adaptive value < -6.00%
Adaptation Range 1 Rich Limit
Exceeded

P1084

Exhaust Bank 3, Mixture
Adaptive value < -30%
Adaptation Range 2 Rich Limit
Exceeded

P1085

Exhaust Bank4, Mixture
Adaptation Range 1 Lean
Limit Not Reached

Adaptive value > 6.00%

P1086

Exhaust Bank4, Mixture
Adaptation Range 2 Lean
Limit Not Reached

Adaptive value > 30%

P1087

Exhaust Bank 4, Mixture
Adaptive value < -6.00%
Adaptation Range 1 Rich Limit
Exceeded

P1088

Exhaust Bank 4, Mixture
Adaptive value < -30%
Adaptation Range 2 Rich Limit
Exceeded

P1094

Incorrect Fuel Composition
or
Electronic Throttle Control
Module

P1167

Mass Air Flow (MAF) Sensor 2 • Air mass too low < -10.00 kg/h
Implausible Signal
• Air mass too high > 1100.00
kg/h
• Mass air flow vs. lower
threshold model < 0 to
500 kg/h
• Mass air flow vs. upper
threshold model > 25 to
1100 kg/h
• Load calculation > 25%
and
• Fuel system (mult.) < -16%
• Load calculation < -20%
and
• Fuel system (mult.) > 25%

• Comparison with fuel quantity
incorrect
or
• Internal check failed
or
• Correction factor incorrect
or
• Fuel quantity incorrect

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 323

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P13EA Ignition Timing Monitor

Difference between commanded
spark timing and actual value
> 10%

P1491

Evaporative Emission System
Purge Control Valve Circuit
Open

Signal voltage > 4.4- 5.6 V

P1647

Checking Coding/Versions of
Control Modules In Can-Bus

-

P117C

Bank3,Oxygen Sensor
Correction Behind Cat Lean
Control Limit Exceeded

I-portion of 2nd lambda control
loop < -0.045

P117D

Bank 3,Oxygen Sensor
Correction Behind Cat Rich
Control Limit Exceeded

I-portion of 2nd lambda control
loop > -0.045

P117E

Bank 4,Oxygen Sensor
Correction Behind Cat Lean
Control Limit Exceeded

I-portion of 2nd lambda control
loop < -0.045

P117F

Bank 4,Oxygen Sensor
Correction Behind Cat Rich
Control Limit Exceeded

I-portion of 2nd lambda control
loop > -0.045

P118A

Bank 3 Sensor 1 Voltage Too
Low/Air Leak

Threshold 1:
• Signal voltage 2.71 to 6.00 V
Threshold 2:
• Signal voltage 2.05 to 3.06 V

P118B

Bank4 Sensor 1 Voltage Too
Low/Air Leak

Threshold 1:
• Signal voltage 2.71 to 6.00 V
Threshold 2:
• Signal voltage 2.05 to 3.06 V

P118C

Oxygen Sensor 2 Bank 3
Signal Too Lean

• O2S signal rear not oscillating
at reference < 0.64 V
and
• Enrichment after stuck lean
28%

P118D

Oxygen Sensor 2 Bank 3
Signal Too Rich

• O2S signal rear not oscillating
at reference > 0.64 V
and
• Enrichment after stuck rich
15%
or
• Sensor voltage (after fuel cut
off) ≥ 0.15V
and
• Number of checks ≥ 1.0

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

Error Message

Malfunction Criteria and
Threshold Value

P118E

Oxygen Sensor 2 Bank 4
Signal Too Lean

• O2S signal rear not oscillating
at reference < 0.64 V
and
• Enrichment after stuck lean
28%

P118F

Oxygen Sensor 2 Bank 4
Signal Too Rich

• O2S signal rear not oscillating
at reference > 0.64 V
and
• Enrichment after stuck rich
15%
or
• Sensor voltage (after fuel cut
off) ≥ 0.15V
and
• Number of checks ≥ 1.0

P12A1

Fuel Rail Pressure Sensor
High Pressure System

• Pressure control activity
< -0.06 MPa
and
• Fuel trim activity > 1.33
and
• Difference between target
pressure - actual pressure
-16.38 to 16.38 MPa

P12A2

Fuel Rail Pressure Sensor
High Pressure System

• Pressure control activity
> 0.02 MPa
and
• Fuel trim activity < 0.60
and
• Difference between target
pressure - actual pressure
-16.38 to 16.38 MPa

P12A4

Fuel Volume Regulator
Control

• Pressure control activity
< -4.0 MPa
• Fuel trim activity 0.75-1.25
• Difference between target
pressure - actual pressure
< -4.0 mPa

P12A5

Fuel Rail Pressure Sensor
High Pressure System

• Pressure control activity
> 0.02 MPa
and
• Fuel trim activity < 0.60
and
• Difference between target
pressure - actual pressure
-16.38 to 16.38 MPa