NHTSA ID Number: 10205699
Manufacturer Communication Number: Quick Reference
TSB/Document Date: 2021-12-27
Summary
Quick reference specification book.
fuel injection Calculated
based on values from last
two engine revolutions
values from last two engine
revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
P0301
Cylinder 1 Misfire Detected
• Rise in engine speed after
fuel injection Calculated
based on values from last
two engine revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 349
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0302
Cylinder 2 Misfire Detected
• Rise in engine speed after
fuel injection Calculated
based on values from last
two engine revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
P0303
Cylinder 3 Misfire Detected
• Rise in engine speed after
fuel injection Calculated
based on values from last
two engine revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
P0304
Cylinder 4 Misfire Detected
• Rise in engine speed after
fuel injection Calculated
based on values from last
two engine revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
P0305
Cylinder 5 Misfire Detected
• Rise in engine speed after
fuel injection Calculated
based on values from last
two engine revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
P0306
Cylinder 6 Misfire Detected
• Rise in engine speed after
fuel injection Calculated
based on values from last
two engine revolutions
• Error threshold 82%
misfire over 440 crankshaft
revolutions
P0321
Engine Speed Input Circuit
Range/Performance
• Counted teeth vs. reference
> 200
• Monitoring reference gap
failure
P0322
Engine Speed Input Circuit No
Signal
• Camshaft signal > 10
and
• Engine speed = no signal
350 Audi
A8/A8L/S8 Quick Reference Specification Book • September 2013
P0381
Error Message
Glow Plug/Heater Indicator
Circuit
Malfunction Criteria and
Threshold Value
Glow plug indicator control
(sent message) vs. glow plug
indicator (recieved message)
status not equal
Additional Exhaust Regulation
DTC
Error Message
Malfunction Criteria and
Threshold Value
P04DD
Cold Start EGR Insufficient
Flow Detected
Control deviation < f(engine
speed, injection quantity, target
air mass flow)
P04DE
Cold Start EGR Excessive
Flow Detected
Ratio of modeled and
measured air mass flow
> f(turbo charger position)
P040B
Exhaust Gas Recirculation
Temperature Sensor Circuit
Range/Performance
Measured sensor temperature
- mean value of modelled
temperature
P040C
Exhaust Gas Recirculation
Temperature Sensor Circuit
Low
Signal voltage < 0.68 V
P040D
Exhaust Gas Recirculation
Temperature Sensor Circuit
High
Signal voltage > 2.61 V
P0401
Exhaust Gas Recircullation
Flow Insufficient Detected
Control deviation < f (engine
speed, injection quantity, target
air mass flow)
P0402
Exhaust Gas Recirculation
Excessive Flow Detected
Ratio of modeled and
measured air mass flow
> 1.3[-]
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 351
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0403
Exhaust Gas Recirculation
Actuator Circuit Functional
Check
• Control deviation > 10.00 [%]
or
• Control deviation < -10.00 [%]
or
• Actual position ≤ 17.00 [%]
• Control deviation > 10.00 [%]
or
• Control deviation < -10.00 [%]
• Actual position > 17.00 [%]
Open circuit:
• Signal voltage > 0.8; < 2.0 [V]
Short to ground:
• Signal current > 8 - 18 [A]
Short to battery voltage:
• Signal current > 8 - 18 [A]
P0404
Exhaust Gas Recirculation
Control Circuit Range/
Performance
• Control deviation > 10%
• Actual position > 17%
P0405
Exhaust Gas Recirculation
Sensor Circuit Low
Position sensor signal < 0.25 V
P0406
Exhaust Gas Recirculation
Sensor Circuit High
Position sensor signal ≥ 4.75 V
P0420
Catalyst System Bank 1
Efficiency Below Threshold
Ratio of measured and
modeled heat quantity < 0.30
P046C
Exhaust Gas Recirculation
Sensor Circuit Range/
Performance
• Position sensor signal
> 1.05 V
Speed and Idle Control
DTC
Error Message
Malfunction Criteria and
Threshold Value
P050A
Cold Start Idle Air Control
System Performance
Idle speed control deviation
more than 10% under or 10%
above desired idle speed
P050E
SCR Catalyst, Temperature,
Plausibility Check
Exhaust gas temperature
< 150° C
P0501
Vehicle Speed Sensor
Performance
Vehicle speed < 4 km/h
P0502
Vehicle Speed Sensor Circuit
Low
Sensor signal failure
P0506
Idle Control System RPM
Lower than Expected
Control deviation < 10%
352 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013
Error Message
Malfunction Criteria and
Threshold Value
P0507
Idle Air Control System - RPM
Higher Than Expected
Control deviation > 10%
P052F
Glow Plug Control Module
System Voltage
Error message from Glow
Control Unit.
P0544
Exhaust Gas Temperature
Signal voltage > 2.61 V
Sensor Circuit Short to Battery
Voltage or Open
P0545
Exhaust Gas Temperature
Sensor Circuit Low
Signal voltage < 0.68 V
Control Module and Output Signals
DTC
Error Message
Malfunction Criteria and
Threshold Value
P06BA
Cylinder 2 Glow Plug Circuit
Range/Performance
• Glow plug resistance
(between 4 - 9 Sec.) < 0.3
ohm
• Glow plug resistance
(between 9 - 14 Sec.) < 0.4
ohm
• Glow plug resistance (after
14 Sec.) < 0.5 ohm
• Glow plug resistance anytime
> 1.2 ohm
P06BB
Cylinder 3 Glow Plug Circuit
Range/Performance
• Glow plug resistance
(between 4 - 9 Sec.) < 0.3
ohm
• Glow plug resistance
(between 9 - 14 Sec.) < 0.4
ohm
• Glow plug resistance (after
14 Sec.) < 0.5 ohm
• Glow plug resistance anytime
> 1.2 ohm
P06BC
Cylinder 4 Glow Plug Circuit
Range/Performance
• Glow plug resistance
(between 4 - 9 Sec.) < 0.3
ohm
• Glow plug resistance
(between 9 - 14 Sec.) < 0.4
ohm
• Glow plug resistance (after
14 Sec.) < 0.5 ohm
• Glow plug resistance anytime
> 1.2 ohm
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 353
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P06BD
Cylinder 5 Glow Plug Circuit
Range/Performance
• Glow plug resistance
(between 4 - 9 Sec.) < 0.3
ohm
• Glow plug resistance
(between 9 - 14 Sec.) < 0.4
ohm
• Glow plug resistance (after
14 Sec.) < 0.5 ohm
• Glow plug resistance anytime
> 1.2 ohm
P06BE
Cylinder 6 Glow Plug Circuit
Range/Performance
• Glow plug resistance
(between 4 - 9 Sec.) < 0.3
ohm
• Glow plug resistance
(between 9 - 14 Sec.) < 0.4
ohm
• Glow plug resistance (after
14 Sec.) < 0.5 ohm
• Glow plug resistance anytime
> 1.2 ohm
P06B0
Reducing Agent Metering
System Control Module
-J880- Detects Short Circuit of
Supply Voltage
Sensor supply voltage < 0.2
>... 5.3 V
P06B9
Cylinder 1 Glow Plug Circuit
Range/Performance
• Glow plug resistance
(between 4 - 9 Sec.) < 0.3
ohm
• Glow plug resistance
(between 9 - 14 Sec.) < 0.4
ohm
• Glow plug resistance (after
14 Sec.) < 0.5 ohm
• Glow plug resistance anytime
> 1.2 ohm
P06E5
Glow Plug Control Module
Performance
Calculated ground offset ≥ 1.75
V or ≤ -1.75 V
P06FE
Cold Start Diesel Intake Air
Flow Control Performance
Signal low
P0604
Internal Control Module
Random Access Memory
(RAM) Error
Read/write error bit set
P0605
Internal Control Module Read
Only Memory (ROM) Error
Internal self test failed
354 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013
Error Message
Malfunction Criteria and
Threshold Value
P0606
Internal Control Module
Memory Check Sum Error
• ECM internal self test failed
• RAM error in memory
P0607
Control Module Performance
• Oxygen sensor adaptation >
0.2 V or < -0.2 V
• Internal communication failed
• Supply voltage for IC < 9 V
or
• Sensor voltage < 0.265 V or
> 3.9 V
P0634
ECM Internal Temperature Too Current Over-Temperature
High
diagnostic signal from output
driver
• Power stage temperature
> 150° C
P0638
Throttle Actuator Control Bank
1 Range/Performance
Diagnostic signal = low state
P064C
Glow Plug Control Module
Received incorrect number of
cylinders or glow plug type is
unequal to ECU application =
error bit
P0641
Sensor Reference Voltage "A"
Circuit Open
Voltage supply < 4.7 V or
> 5.3 V
P0651
Sensor Reference Voltage "B"
Circuit Open
Voltage supply < 4.7 V or
> 5.3 V
P066A
Cylinder 1 Glow Plug Control
Circuit Low
• Glow current ≥ 70 A
P066C
Cylinder 2 Glow Plug Control
Circuit Low
• Glow current ≥ 70 A
P066E
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TSB/Document ID: Quick Reference
Replacement Service Bulletin Number:
MFR Communication Date: 2013-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
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