P046C

Exhaust Gas Recirculation
Sensor Circuit Range/
Performance

Position sensor signal > 1.05 V

P1419

Exhaust Gas Recirculation
Cooler Switch-over Valve 2
Short circuit to Voltage

Diagnostic signal from power
stage > 1.5 A

P146D

Reducing Agent Tank Heater
Short Circuit to Voltage

Signal voltage > 3.27 V

P146F

Heater 2 for Reducing Agent
Short Circuit to Voltage

Signal voltage > 4.70 V

P148F

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

Audi A7 Reference Specification Book

•

September 2013

DTC Chart

P0403

269

DTC

Error Message

Malfunction Criteria and
Threshold Value

P240F

EGR Slow Response

• Calculated characteristically
value: Negative gradients of
target air mass flow > 35 [-]
or
• Calculated characteristically
value: Positive gradients of
Target air mass flow ≥ 30 [-]

P242A

Exhaust Gas Temperature
Sensor Circuit Bank 1 Sensor
3

Signal voltage > 2.61 V

P242B

Exhaust Gas Temperature
Sensor Circuit Bank 1 Sensor
3 Range/Performance

• Temperature difference to EGR
temp, T3, T4, T5, T6 > 40 °K
or
• Mean value of modeled measured T5 > 100 °K

P242C

Exhaust Gas Temperature
Sensor Circuit Low Bank 1
Sensor 3

Signal voltage < 0.68 V

P2425

Exhaust Gas Recirculation
Cooling Valve Control Circuit
Open

Diagnostic signal from power
stage < 2.97 V

P2426

Exhaust Gas Recirculation
Cooling Valve Control Circuit
Grounded

Diagnostic signal from power
stage < 2.97 V

P2427

Exhaust Gas Recirculation
Cooling Valve Control Circuit
Shorted Battery Voltage

Diagnostic signal from power
stage > 2.2 A

P244C

Exhaust Temperature Too
Low For Particulate Filter
Regeneration Bank 1

Time to closed loop 120 - 300
Sec.

P245B

Exhaust Gas Recirculation
Cooler Bypass Control Circuit
Range/Performance

• Positive difference between
measured and target
temperature too high = 10.0 70.0 [K]
or
• Negative difference between
measured and target
temperature too low = -12.0
-7.0 [K]

P2452

Diesel Particulate Filter
Differential Pressure Sensor
Circuit

Sensor voltage > 4.9 V

270

Audi A7 Reference Specification Book

•

September 2013

Error Message

Malfunction Criteria and
Threshold Value

P2453

Diesel Particulate Filter
Differential Pressure Sensor
Circuit Range/Performance

Pressure drop > 3 kPa or < -3
kPa

P2454

Diesel Particulate Filter
Differential Pressure Sensor
Circuit Low

Sensor voltage < 0.2 V

P2458

Diesel Particulate Filter
Regeneration Duration

Time of regen duration > 3600
Sec.

P2459

Diesel Particulate Filter
Regeneration Frequency

Measured soot mass > f
(volumetric flow rate) grams

P246E

Exhaust Gas Temperature
Sensor Circuit Bank 1 Sensor
4

Signal voltage > 1652 mV

P246F

Exhaust Gas Temperature
Sensor Circuit Bank 1 Sensor
4 Range/Performance

• Temperature difference to EGR
temp, T3, T4, T5, T6 > 40 °K
or
• Mean value of modeled measured T5 > 100 °K

P2463

Diesel Particulate Filter - Soot
Accumulation

Calculated particulate matter
trap loading > 40 g

P247A

Exhaust Gas Temperature Out Control deviation (T5) > 200 K
of Range Bank 1 Sensor 3
or < -100 K

P2470

Exhaust Gas Temperature
Sensor Circuit Low Bank 1
Sensor 4

Signal voltage < 330 mV

P24AE

PM Sensor Functional check /
Shorted or Open

• Current (IDE) @ measurement
1 < 2 µA
• Difference between current
(IDE) measurement 1 and 2
or
• Signal voltage positive
connection (IDE) > 4.7 [V]
• Signal voltage positive
connection (IDE) < 0.3 [V]

P24AF

PM Sensor Monitoring,
Rationality Check

• Signal current (IDE) > 5 µA
or
•Accumulated change in heater
voltage < = 0.40 V

P24B1

PM Sensor Circuit Shorted or
open

• Signal voltage negative
connection (IDE) > 4.1 [V]
• Signal voltage negative
connection (IDE) = 0.0 [V]

Audi A7 Reference Specification Book

•

September 2013

271

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P24B3

PM Sensor Heater functional
check

• Heater Coil resistance > 1.06
- 2.31 Ω
• eater Coil resistance < 2.94 5.13 Ω

P24B5

PM Sensor Heater Short to
Ground

• Heating Current < 1.0 A
or
• Heating Current > 15.0 A

P24B6

PM Sensor Heater Short to
Battery Voltage

Heating Current ≥ 0.2 A

P24C7

PM Sensor Plausibility Check

Measured sensor temperature
- mean value of modelled
temperature < - 100 °K

P24D0

PM Sensor Monitoring, Range
/ Performance Check

Signal range check low:
difference between measured
PM Sensor supply wire voltage
and battery voltage (ECM):
• Value > 1.90 [V]
or
• Value > 2.60 [V]
or
• Value > 3.00 [V]
Signal Range Check High:
difference between measured
battery voltage (ECM) and
Sensor supply wire voltage:
• Value > 3.00 [V]
or
• Value > 2.10 [V]
or
• Value > 1.10 [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

272

Audi A7 Reference Specification Book

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September 2013

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0506

Idle Control System RPM
Lower than Expected

Control deviation < 10%

P0507

Idle Control System RPM
Higher than Expected

Control deviation > 10%

P052F

Glow Plug Control Module
System Voltage

Error message from Glow
Control Unit.

P0544

Signal voltage > 2.61 V
Exhaust Gas Temperature
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

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

DTC Chart

P06BA

Audi A7 Reference Specification Book

•

September 2013

273

DTC

Error Message

Malfunction Criteria and
Threshold Value

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

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
Sensor supply voltage < 0.2
System Control Module -J880- >... 5.3 V
detects short circuit of supply
voltage

P06B9

Cylinder 1 Glow Plug Circuit
Range/Performance

274

• 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 A7 Reference Specification Book

•

September 2013

DTC

Error Message

Malfunction Criteria and
Threshold Value