O2 Circuit High Voltage (Bank
1, Sensor 2)

Signal voltage > 1.2 V

P0139

O2 Circuit Slow Response
(Bank 1 Sensor 2)

Average ratio between
measured and maximum
allowed rich to lean switching
time ratio > 1

P013A

O2 Sensor (Bank 1 Sensor 2)
Slow Response - Rich to Lean

Arithmetic filtered max
differential transient time at rich
to lean transition ≤ 800 mV/s
and number of checks ≥ 3

P013B

O2 Sensor (Bank 1 Sensor 2)
Slow Response - Lean to Rich

Arithmetic filtered max
differential transient time at rich
to lean transition ≤ 800 mV/s
and number of checks ≥ 3

P013C

O2 Sensor (Bank 2 Sensor 2)
Slow Response - Rich to Lean

Arithmetic filtered max
differential transient time at rich
to lean transition ≤ 800 mV/s
and number of checks ≥ 3

P013D

O2 Sensor (Bank 2 Sensor 2)
Slow Response - Lean to Rich

Arithmetic filtered max
differential transient time at rich
to lean transition ≤ 800 mV/s
and number of checks ≥ 3

P013E

O2 Sensor (Bank 1 Sensor 2)
Delayed Response - Lean to
Rich

Arithmetic filtered max
differential transient time at rich
to lean transition ≥ 0.800 s and
number of checks ≥ 4

P013F

O2 Sensor (Bank 1 Sensor 2)
Delayed Response - Lean to
Rich

Arithmetic filtered max
differential transient time at rich
to lean transition ≥ 0.800 s and
number of checks ≥ 4

Audi A7 Reference Specification Book

•

September 2013

191

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0140

O2 Circuit No Activity
Detected (Bank 1, Sensor 2)

• Signal voltage 0.376 - 0.474 V

P0141

O2 Heater Circuit
(Bank 1, Sensor 2) Out of
Range

Heater resistance > 10 Ω

P014A

O2 Sensor (Bank 2 Sensor 2)
Delayed Response - Rich to
Lean

Arithmetic filtered max
differential transient time at rich
to lean transition ≥ 0.800 s and
number of checks ≥ 4

P014B

O2 Sensor (Bank 1 Sensor 2)
Delayed Response - Lean to
Rich

Arithmetic filtered max
differential transient time at rich
to lean transition ≥ 0.800 s and
number of checks ≥ 4

P0151

O2 Sensor Circuit, (Bank 2
Bank 1) Low Voltage

Virtual mass < 0.13 V

P0152

O2 Sensor Circuit, (Bank 2
Sensor 1) High Voltage

Signal voltage > 5.5 V

P0153

O2 Circuit Slow Response
(Bank 2, Sensor 1)

Lambda value > 0.9004

P0155

O2 Heater Circuit (Bank 2,
Sensor 1)

UEGO ceramic temperature
< 680 or > 965 °C

P0156

O2 Circuit (Bank 1, Sensor 2)

Oscillation check
• O2S signal rear not oscillating
at reference +/- 10 mV
Signal range check
• Signal voltage > 0.15 V

P0157

O2 Circuit Low Voltage (Bank
1, Sensor 2)

• Signal voltage < 20 mV
and
• Internal resistance < 10 Ohm

P0158

O2 Circuit High Voltage (Bank
1, Sensor 2)

Signal voltage > 1.2 V

P0159

O2 Circuit Slow Response
(Bank 1, Sensor 2)

Average ratio between
measured and maximum
allowed rich to lean switching
time ratio > 1

P0160

O2 Circuit No Activity
Detected (Bank 1, Sensor 2)

Internal resistance
> 60,000 Ohm

P0161

O2 Heater Circuit (Bank 1,
Sensor 2) Out of Range

Heater resistance > 10 Ω

P0169

Incorrect Fuel Composition

Plausibility check failed

P0171

Fuel System Too Lean,
Additive (Bank 1, Bank 2)

Adaptive value > 25%

192

Audi A7 Reference Specification Book

•

September 2013

Error Message

P0172

Fuel System Too RichMultiplicative (Bank 1, Bank 2)

Adaptive value < -25%

P0174

Fuel System Too Lean,
Additive (Bank 1, Bank 2)

Adaptive value > 25%

P0175

System Too Rich-Additive
(Bank 1, Bank 2)

Adaptive value < -25%

P017B

Cylinder Head Temperature
Sensor Circuit Range/
Performance

• Difference in value between
ECT vs. AAT vs. IAT at engine
start (depending on engine off
time) < 26.5 °C
and
• Difference in value between
CHDT vs. ECT at engine start
(depending on engine off time)
> 26.5 °C
and
• Difference in value between
CHDT vs. AAT at engine start
(depending on engine off time)
> 26.5 °C

P017C

Cylinder Head Temperature
Sensor Circuit Low

• Cylinder head temperature
short to ground > 215 °C
• Cylinder head temperature
short to battery plus < -60 °C

P017D

Cylinder Head Temperature
Sensor Circuit High

• Cylinder head temperature
short to ground > 215 °C
• Cylinder head temperature
short to battery plus < -60 °C

P0190

Fuel Rail Pressure Sensor A
Circuit

Signal voltage > 4.6 V

P0191

Fuel Rail Control Valve, High
Pressure Side

Actual pressure > 16.85 MPa

P0192

Fuel Rail Pressure Sensor A
Circuit Low Input

Signal voltage < 0.2 V

P0201

Injector Circuit/Open Cylinder 1

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0202

Injector Circuit/Open Cylinder 2

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0203

Injector Circuit/Open Cylinder 3

• Signal current < 10 A
and
• Signal voltage > 3.5 V

Audi A7 Reference Specification Book

Malfunction Criteria and
Threshold Value

•

September 2013

DTC Chart

DTC

193

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0204

Injector Circuit/Open Cylinder 4

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0205

Injector Circuit/Open Cylinder 5

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0206

Injector Circuit/Open Cylinder 6

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0221

Throttle/Pedal Position
Sensor/Switch B Circuit
Range/Performance

• TPS 1 - TPS 2 > 5.79%
and
• Relative mass air integral >
100 at 0.45 s

P0222

Throttle/Pedal Position
Sensor/Switch B Circuit Low
Input

Signal voltage < 0.117 V

P0223

Throttle/Pedal Position
Sensor/Switch B Circuit High
Input

Signal voltage > 4.6 V

P0235

Boost Pressure Control
Functional Check

Difference between actual
measured charge pressure
quotient and target charge
pressure quotient (1) 0.25 - 0.35

P0236

Turbocharger/Supercharger
Boost Sensor A Plausibility
Check

• Pressure difference in cross
check between boost pressure
sensor 1/2; inlet charger
pressure and ambient
pressure sensor > 7 kPa
• Pressure difference in cross
check between boost pressure
sensor 1/2 and inlet charger
pressure (1) > 12 -27 kPa
• Pressure difference in cross
check between boost pressure
sensor 1 and 2 > 12.5 kPa
and
• Fuel trim activity (bank with
deviation is considered to be
defective) > 15%

P0237

Turbocharger/Supercharger
Boost Sensor A Circuit Low

Signal voltage < 0.2 V

P0238

Turbocharger/Supercharger
Boost Sensor A Circuit High

Signal voltage > 4.8 V

194

Audi A7 Reference Specification Book

•

September 2013

DTC

Error Message

Malfunction Criteria and
Threshold Value

Turbocharger/Supercharger
Boost Sensor Rationality
Check

• Pressure difference in cross
check between boost pressure
sensor 1/2; inlet charger
pressure and ambient
pressure sensor > 7 kPa
• Pressure difference in cross
check between boost pressure
sensor 1/2 and inlet charger
pressure (1) > 12 -27 kPa
• Pressure difference in cross
check between boost pressure
sensor 1 and 2 > 12.5 kPa
and
• Fuel trim activity (bank with
deviation is considered to be
defective) > 15%

P0241

Turbocharger/Supercharger
Boost Sensor -Short to
Ground

Signal voltage < 0.2 V

P0242

Turbocharger/Supercharger
Boost Sensor short to Battery
Voltage

Signal voltage > 4.8 V

P025A

Fuel Pump Module -Open
Control Circuit

Signal current < 0.8 mA

P025C

Fuel Pump Module -Short to
Ground

Signal voltage < 2.0 V

P025D

Fuel Pump Module -Short to
Battery Voltage

Signal current > 1.0 A

P0261

Cylinder 1 Injector Circuit
Short to Ground

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0262

Cylinder 1 Injector Circuit
Short to Battery Voltage

Signal current > 16 A

P0264

Cylinder 2 Injector Circuit
Short to Ground

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0265

Cylinder 2 Injector Circuit
Short to Battery Voltage

Signal current > 16 A

P0267

Cylinder 3 Injector Circuit
Short to Ground

• Signal current < 10 A
and
• Signal voltage > 3.5 V

P0268

Cylinder 3 Injector Circuit
Short to Battery Voltage

Signal current > 16 A

Audi A7 Reference Specification Book

•

September 2013

DTC Chart

P0240

195

DTC

Error Message