NHTSA ID Number: 10205700
Manufacturer Communication Number: Guide
TSB/Document Date: 2021-12-27
Summary
Quick reference specification book.
(Sensor 2) Circuit Low
Signal voltage < 330 mV
P204A
Reducing Agent Pressure
Sensor Circuit Open / Short
Ground
Signal voltage < 0.8 V
P204B
Reducing Agent Pressure
Sensor Circuit Range/
Performance
Actual pressure Reduction
Agent delivery system
> 50.00 kPa
P204D
Reducing Agent Pressure
Sensor Circuit High
Signal voltage > 4.90 V
P2047
Reducing Agent Injection
Valve Circuit Open
Signal Voltage < 4.7 V
P2048
Reducing Agent Injection
Valve Circuit Grounded
• Signal Voltage < 2.97 V
or
• Signal Current > 1.6 A
P2049
Reducing Agent Injection
Valve Circuit Short to Battery
Voltage
• Signal Current > 1.8 A
or
• Analog measure < 200 mA
146
Audi
Q7 Quick Reference Specification Book
•
September 2013
Error Message
Malfunction Criteria and
Threshold Value
P205A
Reducing Agent Tank
Temperature Sensor Circuit
Short to Battery Voltage or
Open
Signal voltage > 4.30 V
P205B
Reducing Agent Tank
Temperature Sensor Circuit
Range/Performance
Case 1:
• AAT > 25 °C
• Difference between Reducing
agent (AdBlue®) to ECT
< -30 °K
Case 2:
• AAT < 25 °C
• Difference between reducing
agent (AdBlue®) to ECT < -30
°K
• Reducing agent temperature
increase while heating tank
< 1.5 K
• For time < 1500.0 s
P205C
Reducing Agent Tank
Temperature Sensor Circuit
Grounded
Signal voltage < 0.04 V
P207F
Reducing Agent Quality
Performance
Average efficiency < 0.50 [-]
P208A
Reducing Agent Pump Control
Circuit/Open
Signal voltage > 4.7 V
P208C
Reducing Agent Pump Control
Circuit Grounded
Signal voltage < 2.74 V
P208D
Reducing Agent Pump Control
Circuit High
Signal current > 4.0 A
P208E
Reducing Agent Injection
Valve Stuck Closed (Bank 1
Unit 1)
Missing number of signal peaks
> 50
P2080
Exhaust Gas Temperature
Sensor Circuit Bank 1 Range/
Performance
• Temperature difference to
temp EGR T3, T4, T5, T6
> 60 °K
or
• Mean value of modeled to
measured T4 > 100 °K
P2084
Exhaust Gas Temperature
Sensor 2 Circuit Range/
Performance
• Temperature difference to
temp EGR T3, T4, T5, T6
> 60 °K
or
• Mean value of modeled to
measured T3 > 100 °K
Audi Q7 Quick Reference Specification Book
•
September 2013
147
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
P20BB
Reducing Agent Tank Heater
Control Circuit Shorted to
Ground
Diagnostic signal from power
stage < 2.97 V
P20BC
Reducing Agent Tank Heater
Control Circuit Shorted to
Battery Voltage
Diagnostic signal from power
stage > 2.2 A
P20BD
Reducing Agent Heater 2
Control Circuit/Open
Diagnostic signal from power
stage > 4.7 V
P20BF
Reducing Agent Heater 2
Control Circuit/Low
Diagnostic signal from power
stage < 2.97 V
P20B5
Reducing Agent Metering Unit
Heater Control Circuit/Open
Conductance during heating
≤ 0.10 1/Ohm
P20B7
Reducing Agent Metering Unit
Heater Control Circuit Low
Conductance @ start heating
< 0.30 1/Ohm
P20B8
Reducing Agent Metering Unit
Heater Control Circuit High
Conductance @ start heating
> 1.00 1/Ohm
P20B9
Reducing Agent Tank Heater
Control Circuit Open
Diagnostic signal from power
stage < 4.7 V
P20C0
Reducing Agent Heater 2
Control Circuit High
Diagnostic signal from power
stage > 2.2 A
P20EE
SCR NOx Catalyst Efficiency
Below Threshold
Difference between calculated
and measured efficiency < 0.2[-]
P20E8
Reducing Agent Pressure Too
Low / Functional Check
• Actual pressure < 300.00 kPa
for 55 s
or
• Actual pressure < 400.00 kPa
for 60 s
or
• Pressure built up for 21.00[-]
Attempts > 350 kPa
P20E9
Reducing Agent Pressure Too
High
• Actual pressure > 790.00 kPa
for 0.0 s
or
• Actual pressure > 650.00 kPa
for 10 s
or
• Pressure @ Dosing end > 50
kPa
P20F4
Reducing Agent Consumption
Too High
SCR adaptive value ≥ 1.79
P20F5
Reducing Agent Consumption
Too Low
SCR adaptive value ≤ 0.51
148
Audi Q7 Quick Reference Specification Book
•
September 2013
Ignition System
Error Message
Malfunction Criteria and
Threshold Value
P0300
Random/Multiple Cylinder
Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
• Number of cylinders with
detected misfire > 1.00
P0301
Cylinder 1 Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
P0302
Cylinder 2 Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
P0303
Cylinder 3 Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
P0304
Cylinder 4 Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
P0305
Cylinder 5 Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
P0306
Cylinder 6 Misfire Detected
• Counted misfire per cylinder
> 180.00
• Number of combustion cycles
tested ≥ 220.00
P0321
Ignition/Distributor Engine
Speed Input Circuit Range/
Performance
• Counted teeth vs. reference
> 200.0
or
• Monitoring reference gap
failure
P0322
Ignition/Distributor Engine
Speed Input Circuit No Signal
• Camshaft signals > 3.00
and
• Camshaft signals = no signal
P0381
Glow Plug/Heater Indicator
Control Circuit/Open
Glow plug indicator control
(sent message) vs. glow plug
indicator (recieved message)
status not equal
Audi Q7 Quick Reference Specification Book
•
September 2013
149
DTC Chart
DTC
Additional Exhaust Regulation
DTC
Error Message
Malfunction Criteria and
Threshold Value
P0401
EGR "A" Flow Insufficient
Detected
Control deviation (EGR) < - 45.0
to 200.0 g/rev
P0402
EGR "A" Flow Excessive
Detected
Mass air flow ratio calculated
from: mass air flow measured
vs. mass air flow modeled
> 1.29
P0403
EGR "A" Control Circuit/Open
• Signal current > 8.00 to 18.0 A
• Control deviation > 10.00%
or
• Control deviation 17.00%
P0404
EGR "A" Control Circuit
Range/Performance
• Control deviation > 10%
• Actual position > 17%
P0405
EGR Sensor "A" Circuit Low
Position sensor signal ≥ 0.25 V
P0406
EGR Sensor "A" Circuit High
Position sensor signal ≥ 4.75 V
P040B
EGR Temperature Sensor "A"
Circuit Range/Performance
• Measured sensor temperature
- mean value of modelled
temperature < -90.0 to -40.0 K
Cross Checks for Fault
Detection:
• TEGR vs. EGT upstream
Catalyst > 40.0 K
• TEGR vs. EGT downstream
Catalyst > 40.0 K
• TEGR vs. EGT downstream
DPF > 40.0 K
• TEGR vs. EGT upstream
Turbocharger > 40.0 K
P040C
EGR Temperature Sensor "A"
Circuit Low
Signal voltage < 0.68 V
P040D
EGR Temperature Sensor "A"
Circuit High
Signal voltage > 2.61 V
P0420
Catalyst System Efficiency
Below Threshold Bank 1
Ratio of measured and modeled
heat < 0.30
P046C
EGR Sensor "A" Circuit
Range/Performance
• Position sensor signal > 1.05 V
Out of range
• Position sensor signal 0.25 to
0.35 V
P04DD Cold Start EGR "A" Flow
Insufficient Detected
150
Control deviation < f (engine
speed, injection quantity, target
air mass flow)
Audi Q7 Quick Reference Specification Book
•
September 2013
DTC
P04DE
Error Message
Cold Start EGR "A" Flow
Excessive Detected
Malfunction Criteria and
Threshold Value
Ratio of modeled and measured
air mass flow > f (turbo charger
position)
Speed and Idle Control
Error Message
Malfunction Criteria and
Threshold Value
P0501
Vehicle Speed Sensor "A"
Circuit Range/Performance
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TSB/Document ID: Guide
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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