Signal voltage < 0.65V

P2123

Throttle/Pedal Position
Sensor/Switch D Circuit High
Input

Signal voltage > 4.79 V

P2127

Throttle/Pedal Position
Sensor/Switch E Circuit Low
Input

Signal voltage < 0.28 V

P2128

Throttle/Pedal Position
Sensor/Switch E Circuit High
Input

Signal voltage > 2.43 V

P2138

Throttle/Pedal Position
Sensor/Switch D/E Voltage
Correlation

Signal voltage: Difference
between signal sensor 1 vs. 2
> 0.14 - 0.70 V

P2146

Fuel Injector Group A Supply
Voltage Circuit/Open

Short to ground (high side)
• Signal current > 14.90 A
Short to battery plus (high side)
• Signal current < 2.60 A

P2149

Fuel Injector Group B Supply
Voltage Circuit/Open

Short to ground (high side)
• Signal current > 14.90 A
Short to battery plus (high side)
• Signal current < 2.60 A

P2152

Fuel Injector Group “C” Supply Short to ground (high side)
Voltage Circuit/Open
• Signal current > 14.90 A
Short to battery plus (high side)
• Signal current < 2.60 A

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Error Message

Malfunction Criteria and
Threshold Value

P2155

Fuel Injector Group “D” Supply Short to ground (high side)
Voltage Circuit/Open
• Signal current > 14.90 A
Short to battery plus (high side)
• Signal current < 2.60 A

P2181

Cooling System Performance

Cooling system temperature too
low after a sufficient air mass
flow integral < 75°C

P2195

O2 Sensor Signal Stuck Lean
(Bank 1 Sensor 1)

Delta lambda of 2nd lambda
control loop > 0.070

P2196

O2 Sensor Signal Stuck Rich
(Bank 1 Sensor 1)

Delta lambda of 2nd lambda
control loop < 0.070

P2197

O2 Sensor Signal Stuck Lean
(Bank 2 Sensor 1)

Delta lambda of 2nd lambda
control loop > 0.070

P2198

O2 Sensor Signal Stuck Rich
Bank 2 Sensor 1

Delta lambda of 2nd lambda
control loop < 0.070

P2234

O2 Sensor (Bank 2 Sensor
1) Signal Circuit Shorted to
Heater Circuit

• Delta O2S signal front
> 0.2 - 0.498 V
• Elapsed time since last O2S
< 0.05 Sec

P2237

O2 Sensor Positive Current
Control Circuit (Bank 1,
Sensor 1) Open

• O2S signal front 1.46 - 1.54 V
and
• Delta lambda controller > 0.20

P2240

O2 Sensor Positive Current
• O2S signal front 1.46 - 1.54 V
Control Circuit (Bank 2 Sensor and
1) Open
• Delta lambda controller > 0.20

P2243

O2 Sensor Reference Voltage
Circuit (Bank 1 Sensor 1)
Open

• O2S signal front < 0.30 V and
Internal resistance
> 1000 Ohms
• O2S signal front > 3.25 V and
Internal resistance
> 1000 Ohms

P2247

O2 Sensor Reference Voltage
Circuit Bank 2 Sensor 1 Open

• O2S signal front > 4.70 V
and
• Internal resistance > 950Ω
• O2S signal front < 0.20 V
and
• Internal resistance > 950Ω

P2251

O2 Sensor Negative Current
• O2S signal front 1.42 - 1.50 V
Control Circuit (Bank 1 Sensor and
1) open
• Internal resistance > 950 Ω

P2254

O2 Sensor Negative Current
• O2S signal front 1.42 - 1.50 V
Control Circuit (Bank 2 Sensor and
1) open
• Internal resistance > 950 Ω

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293

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2257

Secondary Air Injection
System Control “A” Circuit
Low

Signal voltage 0.0 - 3.26 V

P2258

Secondary Air Injection
System Control “A” Circuit
High

Signal current 0.60 - 2.40 A

P2270

O2 Sensor Signal Stuck Lean;
Bank 1 Sensor 2

• O2S signal rear not oscillating
at reference < 0.67 - 0.72 V
and
• Enrichment after stuck lean
25.00%

P2271

O2 Sensor Signal Stuck Rich
(Bank 1, Sensor 2)

• O2S signal rear not oscillating
at reference < 0.67 - 0.72 V
and
• Enrichment after stuck lean
25.00%

P2272

O2 Sensor Signal Stuck Lean;
Bank 2 Sensor 2

• O2S signal rear not oscillating
at reference < 0.67 - 0.72 V
and
• Enrichment after stuck lean
25.00%

P2273

O2 Sensor Signal Stuck Rich;
Bank 2 Sensor 2

• O2S signal rear not oscillating
at reference < 0.67 - 0.72 V
and
• Enrichment after stuck lean
25.00%

P2279

Intake Air System Leak

• Offset value throttle mass flow
> 21.50 kg/h
and
• Correction factor > 0.97

P2294

Fuel Pressure Regulator 2
Control Circuit

Open circuit
• Signal voltage 1.40 - 3.20 V
Rationality check
• Signal pattern incorrect

P2295

Fuel Pressure Regulator 2
Control Circuit Low Short to
Ground

Signal voltage < 1.40 - 3.20 V

P2296

Fuel Pressure Regulator 2
Control Circuit High

Short to battery plus signal
voltage > 3.20 V

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Ignition System
Error Message

Malfunction Criteria and
Threshold Value

P2300

Ignition Coil A Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2301

Ignition Coil A Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

P2303

Ignition Coil B Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2304

Ignition Coil B Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

P2306

Ignition Coil C Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2307

Ignition Coil C Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

P2309

Ignition Coil D Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2310

Ignition Coil D Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

P2312

Ignition Coil E Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2313

Ignition Coil E Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

P2315

Ignition Coil F Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2316

Ignition Coil F Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

P2318

Ignition Coil G Primary Control Short to ground signal current
Circuit Low
> 24.0 mA

P2319

Ignition Coil G Primary Control Short to battery plus signal
Circuit High
current > 5.1 - 7.0 mA

P2321

Ignition Coil H Primary Control
Circuit Low

Short to ground signal current
> 24.0 mA

P2322

Ignition Coil H Primary Control
Circuit High

Short to battery plus signal
current > 5.1 - 7.0 mA

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DTC Chart

DTC

295

Additional Emissions Regulations
DTC

Error Message

Malfunction Criteria and
Threshold Value

P2414

O2 Sensor Exhaust Sample
Error (Bank 1, Sensor 1)

• Threshold 1 - Signal voltage
2.71 - 5.00 V
• Threshold 2 - Depending on
gain factor, that actual is used
for sensor characteristic, the
threshold is signal voltage
2.05 - 3.06 V

P2415

02 Sensor Exhaust Sample
Error, (Bank 2 Sensor 1)

• Threshold 1 - Signal voltage
2.71 - 5.00 V
• Threshold 2 - Depending on
gain factor, that actual is used
for sensor characteristic, the
threshold is signal voltage
2.05 - 3.06 V

P2431

Secondary Air Injection
System Air Flow/Pressure
Bank 1 Sensor Circuit Range/
Performance

Difference between AIR
pressure and ambient pressure
-6.00; > 6.00 kPa

P2432

Secondary Air Injection
System Air Flow/Pressure
(Bank 1) Sensor Circuit Low

Signal voltage < 0.40 V

P2433

Secondary Air Injection
System Air Flow/Pressure
(Bank 1) Sensor Circuit High

Signal voltage > 4.60 V

P2440

Secondary Air Injection
System Switching Valve Stuck
Open (Bank 1)

• Relative AIR pressure
measured ≤ 2.0 kPa
• Blockage: relative SAIR
pressure > 0.27
• Leakage: relative SAIR Bank 1
pressure > 0.27

P2442

Secondary Air Injection
System Switching Valve Stuck
Open (Bank 2)

• Relative AIR pressure
measured ≤ 2.0 kPa
• Blockage: relative SAIR
pressure > 0.27
• Leakage: relative SAIR Bank 1
pressure > 0.27

P2539

Low Pressure Fuel System
Sensor Circuit

Signal voltage > 4.80 V

P2541

Low Pressure Fuel System
Sensor Circuit Low

Signal voltage < 0.20 V

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Audi of America reserves the right to change or update any part of this
technical manual at any time. No legal commitment can therefore be
derived from the information, illustrations or descriptions in this manual.
The texts, illustrations and standards in this manual are based on the
information available at the time of printing. No part of this manual may
be reprinted, reproduced or translated without the written permission of
Audi of America.
All rights under the copyright laws are expressly reserved by Audi of
America. Subject to alteration and amendment.
Printed in the United States
© 2012 Audi of America, Inc.

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