NHTSA ID Number: 10203513
Manufacturer Communication Number: QRSB Audi
Q7
TSB/Document Date: 2021-11-15
Summary
Quick reference specification book.
U0155
Lost Communication with
Instrument Panel Cluster
(IPC) Control Module
No CAN messages received
from Instrument cluster
U02A3
Lost Communication with PM
Sensor
No CAN message received
U0302
Software Incompatibility with
Transmission Control Module
Auto trans messages received
from ECM
U0307
Software Incompatibility with
Glow Plug Control Module
Error bit = set
Audi Q7 Quick Reference Specification Book
•
September 2013
155
DTC Chart
DTC
DTC
Error Message
Malfunction Criteria and
Threshold Value
U0402
Invalid Data Received From
Transmission Control Module
Wrong TCM messages
received.
U0407
Invalid Data Received From
Glow Plug Control Module
Implausible messages received
U0415
Invalid Data Received From
Anti-Lock Brake System
Control Module
• Error bit = set
• Implausible data from ABS
or
• Speed sensor signal = 655.35
km/h
U0423
Invalid Data Received From
Instrument Panel Cluster
Control Module
Error message sent from
instrument cluster = invalid data
U0447
Invalid Data Received From
Gateway “A”
Implausible message from
gateway
U04A4
NOx Sensor Communication
Check / Signal Range Check
Communication error
U1006
NOx Sensor 1 (Front) No
communication
No messages from NOx sensor
1 module
U1024
Communications Bus Fault
Error bit set
U1034
NOx Sensor 1 (Front)
Implausible Signal
Data from NOx sensor 1 module
implausible
U10C1
NOx Sensor 1 (Rear)
Implausible Signal
Data from NOx sensor 2 module
implausible
U10C2
NOx Sensor 1 (Rear) No
Communication
No messages from NOx sensor
2 module
P1103
ECM: Production Mode
Production mode = Active
Fuel and Air Ratios Control Module
DTC
Error Message
Malfunction Criteria and
Threshold Value
P1419
Exhaust Gas Recirculation
Cooler Switch-Over Valve 2
Short Circuit to Voltage
Diagnostic signal from power
stage > 1.5 A
P146D
Heater 1 for Reducing Agent
Sensor Short Circuit to
Voltage
Signal voltage > 4.70 V
P146F
Heater 2 for Reducing Agent
Short Circuit to Voltage
Signal voltage > 4.70 V
156
Audi Q7 Quick Reference Specification Book
•
September 2013
DTC
Error Message
Malfunction Criteria and
Threshold Value
Exhaust Gas Recirculation
Cooler Switch-Over Valve 2
Electrical Malfunction
Diagnostic signal from power
stage < 2.97 V
P1499
Exhaust Gas Recirculation
Cooler Switch-Over Valve 2
Open Circuit/Short Circuit to
Ground
Diagnostic signal from power
stage > 4.5 V
P149D
Reducing agent transfer pump
Open circuit
Signal voltage < 4.70 V
P149E
Reducing Agent Transfer
Pump Circuit Grounded
Signal voltage < 2.97 V
P149F
Reducing Agent Transfer
Pump Circuit Short to Battery
Voltage
Signal Current > 3.0 A
P150A
Engine Off Time Performance
ECM time - IPC time > 12 Sec.
P2100
Throttle Actuator Control
Motor Circuit/Open
Signal from power stage
> 3.26 V and < 5.40 V
P2101
Throttle Actuator Control
Motor Circuit Range/
Performance
Signal = no change
P2102
Throttle Actuator Control
Motor Circuit Low
Signal from power stage
≤ 3.26 V
P2103
Throttle Actuator Control
Motor Circuit High
Signal from power stage
> 1.50 V and > 50 mA
P2122
Throttle/Pedal Position
Sensor/Switch D Circuit Low
Input
Signal voltage < 0.646 V
P2123
Throttle/Pedal Position
Sensor/Switch D Circuit High
Input
Signal voltage > 4.889 V
P2127
Throttle/Pedal Position
Sensor/Switch E Circuit Low
Input
Signal voltage < 0.276 V
P2128
Throttle/Pedal Position
Sensor/Switch E Circuit High
Input
Signal voltage > 2.644 V
P2138
Throttle/Pedal Position
Sensor/Switch D/E Voltage
Correlation
Signal voltage sensor 1 vs.
sensor 2 > 143 - 260 mV
P2146
Fuel Injector Group "A" Supply Diagnostic signal from power
Voltage Circuit Open
stage = internal signal
Audi Q7 Quick Reference Specification Book
•
September 2013
DTC Chart
P148F
157
DTC
Error Message
Malfunction Criteria and
Threshold Value
P2149/
P2152
Fuel Injector Group C Supply
Voltage Circuit/Open
Diagnostic signal from power
stage = internal signal
P2181
Engine Coolant Temperature
Sensor On Radiator Outlet
Circuit Rationality Check
Deviation between target and
measured ECT < -7.5 Kelvin
P2183
Engine Coolant Temperature
Sensor On Radiator Outlet
Circuit Cross Check
ECT 2 at radiator outlet vs IAT
or AAT or FTS at start up > 35
Kelvin
P2184
Engine Coolant Temperature
Sensor On Radiator Outlet
Circuit Grounded
Signal voltage < 162 mV
P2185
Engine Coolant Temperature
Sensor On Radiator Outlet
Circuit Short to Battery
Voltage
Signal voltage > 3255 mV
P2195
O2 Sensor Signal Stuck Lean
(Bank 1, Sensor 1)
• Measured oxygen
concentration @ fuel cutoff
> 25.6%
or
• Measured oxygen
concentration @ part load
> (calculated) 6.5%
P2196
O2 Sensor Signal Stuck Rich
(Bank 1, Sensor 1)
Measured oxygen concentration
@ fuel cutoff > 14.7%
P220A
NOx Sensor Front Circuit
Supply Voltage
Sensor supply voltage > 1.5 or
< 12 V
P220B
NOx Sensor Rear Supply
Voltage Circuit
Sensor supply voltage > 1.5
P2200
NOx Sensor Front Circuit
Failure
NOx sensor signal ratio of
validity > = 0.50 [-]
P2201
NOx Sensor Circuit Range/
Performance
• NOx 40 - 70%, time > 5 Sec.
or 40% value not reached
within 7 Sec.
• Ratio > 3 or < -0.75
• Average NOx Offset value > 50
or < -30 ppm
P2202
NOx Sensor Front Circuit Low
NOx value < -105 ppm
P2203
NOx Sensor Front Circuit High NOx value > 1655 ppm
P2209
NOx Sensor Front Rationality
Check
158
NOx control active time since
dew point exceeded
Audi Q7 Quick Reference Specification Book
•
September 2013
Error Message
Malfunction Criteria and
Threshold Value
P2237
O2 Sensor Positive Current
Measured oxygen concentration
Control Circuit (Bank 1 Sensor < 0.005
1) Open
P2243
O2 Sensor Reference Voltage
Circuit (Bank 1 Sensor 1)
Open
P2251
• O2S internal resistance
O2 Sensor Negative Current
Control Circuit (Bank 1 Sensor
voltage> 3 V
• Oxygen signal < -1.3 V or
1) Open
> 1.5 V
P2263
Turbocharger Boost System
Performance
Control deviation > 8%
P2279
Turbocharger Boost Pressure
Intake Air System Leak
Ratio of measured and modeled
mass air flow = 0.45 - 0.80[-]
P229E
NOx Sensor Rear Circuit
Short or Open
• Message From NOx Sensor =
Failure
or
• NOx sensor status ratio of
validity ≥ 0.5[-]
P229F
NOx Sensor Rear Circuit
Range /Performance
• Average NOx offset value > 50
ppm
• Number of checks = 2
or
• Average NOx offset value > 50
or < -30 ppm
• Number of checks = 2[-]
or
• Measured oxygen
concentration compared
with calculated oxygen
concentration deviation @ part
load > 5.3%
P2294
Fuel Pressure Metering Valve
Control Circuit Open
Signal Voltage < 4.7 V
P2295
Fuel Pressure Metering Valve
Control Circuit Grounded
Signal Voltage < 2.97 V
P2296
Fuel Pressure Metering Valve Signal Current > 3.0 A
Control Circuit Short to Battery
Voltage
P22A0
NOx Sensor Rear Circuit Low
NOx value < -105 ppm
P22A1
NOx Sensor Rear Circuit High
NOx value > 1655 ppm
P22A7
NOx Sensor Rear Rationality
Check
NOx control active time since
dew point exceeded >180 s
• O2S internal resistance > 3 V
• Oxygen signal < -1.3 V or
> 1.5 V
Audi Q7 Quick Reference Specification Book
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TSB/Document ID: QRSB Audi Q7
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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