NHTSA ID Number: 10203512
Manufacturer Communication Number: QRSB Audi
A8 A8L
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
Ignition Coil "G" Primary
Control Circuit/Open
Open circuit
• Signal current < 0.25 to
2.0 mA
or
• Internal check failed
P0358
Ignition Coil "H" Primary
Control Circuit/Open
Open circuit
• Signal current < 0.25 to
2.0 mA
or
• Internal check failed
P0366
Camshaft Position Sensor "B"
Circuit Range/Performance
Bank 1
• Signal pattern incorrect
• Defect counter 6
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 261
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0367
Camshaft Position Sensor "B"
Circuit Low Bank 1
• Signal voltage permanently low
and
• Crankshaft signals 4.00
P0368
Camshaft Position Sensor "B"
Circuit High Bank 1
• Signal voltage permanently
high
and
• Crankshaft signals 4.00
P0391
Camshaft Position Sensor "B"
Circuit Range/Performance
Bank 2
• Signal pattern incorrect
• Defect counter 6
P0392
Camshaft Position Sensor "B"
Circuit Low Bank 2
• Signal voltage permanently low
and
• Crankshaft signals 4.00
P0393
amshaft Position Sensor "B"
Circuit High Bank 2
• Signal voltage permanently
high
and
• Crankshaft signals 4.00
Additional Exhaust Regulation
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0410
Secondary Air Injection
System Malfunction
Difference ambient pressure vs.
AIR pressure measured with
AIR pressure sensor > 3.00 kPa
P0413
Secondary Air Injection
System Switching Valve Open
Signal voltage 4.70 - 5.40 V
P0414
AIR System Switching Valve
"A" Circuit Shorted
Signal current > 2.20 A or signal
voltage 0.0 - 3.25 V
P0415
Secondary Air Injection
System Switching Valve
Shorted to B+
Signal current 2.20 - 4.20 A
P0416
Secondary Air Injection
System Switching Valve Open
Signal voltage 4.70 - 5.40 V
P0417
AIR System Switching Valve
"B" Circuit Shorted
Signal voltage 0.0 - 3.25 V or
signal current > 2.20 A
P0418
Secondary Air Injection
System Relay A Circuit
Signal voltage 4.70 - 5.40 V
P0420
Catalyst System Efficiency
Below Threshold
Measured OSC / OSC of
borderline catalyst. EWMA filter
value for catalyst , < 1.0
262 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013
Error Message
Malfunction Criteria and
Threshold Value
P0421
Catalyst Bank 1
EWMA filter value for catalyst
< 0.2
P0430
Catalyst System, Bank2
Efficiency Below Threshold
Amplitude ratio O2S > 1.5
P0431
Catalyst Bank 2
EWMA filter value for catalyst
< 0.2
P0441
Evaporative Emission System
functional check Valve Stuck
(Purge Flow)
• Deviation lambda control
< 2.50%
and
• Deviation idle control < 20%
P0442
Evaporative Emission System
Leak Detected (Small Leak)
Time for pressure drop
< 1.7 - 2.2 s.
P0444
Evaporative Emission System
Purge Control Valve Circuit
Open
Signal voltage > 4.70 - 5.40 V
P0445
Evaporative Emission System
Purge Control Valve Short to
Ground
Evaporative Emission System
Purge Control Valve Short to
battery Plus
• Signal voltage < 2.0 V
P0450
NVLD switch
Open Circuit signal voltage 0.39
- 0.55 V
P0451
NVLD switch
Natural vacuum leak detection
(NVLD) switch position stuck
closed
P0452
NVLD switch
Short to ground signal voltage
< 0.24 V
P0453
NVLD switch
Short to battery voltage signal
voltage > 3.0 V
P0455
Evaporative Emission System
Leak Detected (gross leak/no
flow)
Time for pressure drop
< 0.95 - 1.1 Sec.
P0456
Evaporative Emission System
Leak Detected (very small
leak)
• Natural vacuum leak detection
(NVLD) switch position
• Switch Open
P0458
Evaporative Emission System
Purge Control Valve Circuit
Low or Short to Ground
Signal voltage, < 0.0 - 3.26 V
P0459
Evaporative Emission System
Purge Control Valve Circuit
High or Short to Voltage
Signal current > 2.2 A
• Signal current >1.0 A
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 263
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0461
Fuel Level Sensor Circuit
Range/Performance
Difference between fuel
consuption and fuel level
changes, < -12.00 - > 12.00
P0462
Fuel Level Sensor "A" Circuit
Low
Instrument cluster module signal
short
P0463
Fuel Level Sensor "A" Circuit
High
Instrument cluster module signal
open
264 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013
P0491
Error Message
Secondary Air Injection
System Insufficient Flow
Bank 1
Malfunction Criteria and
Threshold Value
• Blockage: relative AIR
pressure measured with AIR
pressure sensor vs. modeled
< 0.10 [-]
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.10 [-]
and
• Relative AIR pressure
measured ≤ 3.00 kPa
or
• Blockage: relative AIR
pressure measured with AIR
pressure sensor vs. modeled
< 0.45 [-]
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.45 [-]
and
• Relative AIR pressure
measured ≤ 3.00 kPa
or
• Blockage: relative AIR
pressure measured with
AIR pressure sensor vs.
modeled while valve bank 2
commanded closed < 0.70[-]
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled while
valve bank 2 commanded
closed < 0.70 [-]
and
• Relative AIR pressure
measured ≤ 3.00 kPa
or
• Average pressure difference
between absolute value and
filtered value while valve bank
2 commanded closed < 0.14 1.22 kPa
and
• Relative AIR pressure
measured ≤ 3.00 kPa
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 265
DTC Chart
DTC
DTC
Error Message
P0492
Secondary Air System
Insufficient Flow Bank 2
Malfunction Criteria and
Threshold Value
• Blockage: relative AIR
pressure measured with AIR
pressure sensor vs. modeled
< 0.10 [-]
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.10 [-]
and
• Relative AIR pressure
measured ≤ 3.00 kPa
or
• Blockage: relative AIR
pressure measured with AIR
pressure sensor vs. modeled
< 0.45 [-]
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.45 [-]
and
• Relative AIR pressure
measured ≤ 3.00 kPa
or
• Blockage: relative AIR
pressure measured with
AIR pressure sensor vs.
modeled while valve bank 2
commanded closed < 0.70[-]
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled while
valve bank 2 commanded
closed < 0.70 [-]
and
• Relative AIR pressure
measured ≤ 3.00 kPa
or
• Average pressure difference
between absolute value and
filtered value while valve bank
2 commanded closed < 0.14 1.22 kPa
and
• Relative AIR pressure
measured ≤ 3.00 kPa
266 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0501
Vehicle Speed Sensor “A”
Circuit Range/Performance
Speed sensor signal: plausibility
error failure
P0502
Vehicle Speed Sensor “A”
Circuit Low
Speed sensor signal: electrical
error failure
P0503
Vehicle Speed Sensor A Out
of Range High
Vehicle speed > 200 km/h
P0506
Idle Air Control System RPM
Lower Than Expected
• Engine speed deviation < -80
RPM
and
• RPM controller torque value
≥ calculated max value
P0507
Idle Air Control System RPM
Higher Than Expected
• Engine speed deviation
> -80 RPM
and
• RPM controller torque value
≤ calculated max. value
P0597
Thermostat Heater Control
Circuit Open
Signal voltage 4.70 - 5.40 V
P0598
Thermostat Heater Control
Circuit Low
Signal voltage 0.0 - 3.25 V
P0599
Thermostat Heater Control
Circuit High
Signal current > 2.20 A
P050A
Cold Start Idle Air Control
System Performance
RPM lower:
• Engine speed deviation > 200
RPM
and
• RPM controller torque value
≥ calculated max. value
RPM Higher:
• Engine speed deviation < -200
RPM
and
• RPM controller torque value
≤ calculated min. value
P050B
Idle Ignition timing monitor
Difference between commanded
spark timing vs. actual value
> 16.50% - 30.00%
P052A
Cold Start “A” Camshaft
Position Timing OverAdvanced Bank 1
Difference between target
position vs. actual position
> 8°CA
Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 267
DTC Chart
Speed and Idle Control
DTC
Error Message
Malfunction Criteria and
Threshold Value
P052C
Cold Start “A” Camshaft
Position Timing OverAdvanced Bank 2
Difference between target
position vs. actual position
> 8° CA
P053F
Fuel Rail Pressure Control
Valve
• Target pressure-actual
pressure > 1.30 MPa
• Difference between target
pressure vs. actual pressure
< -3.00 mPa
P054A
Cold Start “B” Camshaft
Position Timing OverAdvanced Bank 1
Difference between target
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TSB/Document ID: QRSB Audi A8 A8L
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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