Bank 1 Sensor 2

Heater resistance, (128-648)*(840)1.02-25.9 k Ω (dep. on
mod. exhaust temp. and heater
power)

P12A1

Fuel Rail Pressure Sensor
Inappropriately Low

• Pressure control activity
> 0.18 MPa
and
• Fuel trim activity < 0.80
and
• Difference between target
pressure vs. actual pressure
-16.38 to 16.38 MPa

P12A2

Fuel Rail Pressure Sensor
Inappropriately High

• Pressure control activity
< -0.05 mPa
and
• Fuel trim activity > 0.80
and
• Difference between target
pressure vs. actual pressure
-16.38 to 16.38 MPa

P12A4

Fuel Rail Pump Control Valve
Stuck Closed

• Pressure control activity,
22%

P150A

• Difference between engine off
time and ECM after run time
< -12.0 Sec.
• Difference between engine off
time and ECM after run time
> 12.0 Sec.

Engine Off Time Performance

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159

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2101

Throttle Actuator “A” Control
Motor Circuit Range/
Performance

• Duty cycle >80%
and
• ECM power stage, no failure
or
• Deviation throttle value angles
vs. calculated value
> 4.00 - 50.00%

P2106

Throttle Actuator Control
System - Forced Limited
Power

Internal check failed

P2110

Throttle Actuator Control
System - Forced Limited RPM

Engine load out of range

P2122

Throttle/Pedal Position
Sensor/Switch “D” Circuit Low

Signal voltage < 0.61 V

P2123

Throttle/Pedal Position
Signal voltage > 4.79 V
Sensor/Switch “D” Circuit High

P2127

Throttle/Pedal Position
Sensor/Switch “E” Circuit Low

Signal voltage < 0.27 V

P2128

Throttle/Pedal Position
Sensor/Switch “E” Circuit High

Signal voltage > 2.43 V

P2138

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

Signal voltage sensor 1 vs 2,
0.17 to 0.70 V

P2146

Fuel Injector Group “A” Supply • Signal current < 2.6 A
Voltage Circuit/Open
or
• Signal current > 14.90 A

P2149

Fuel Injector Group “B” Supply • Signal current < 2.6 A
Voltage Circuit/Open
or
• Signal current > 14.90 A

P2177

System Too Lean Off Idle
Bank 1

P2178

System Too Rich Off Idle Bank Adaptive value < 26%
1

P2181

Cooling System Performance

Cooling system temperature too
low after a sufficient mass air
flow integral < 74.0 to 84.0° C

P2184

Engine Coolant Temperature
Sensor 2 Circuit Low

ECT outlet > 141° C

P2185

Engine Coolant Temperature
Sensor 2 Circuit High

ECT outlet < -43° C

P2187

System Too Lean at Idle Bank
1

Adaptive value > 6.00%

160

Adaptive value > 26%

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Error Message

Malfunction Criteria and
Threshold Value

P2188

System Too Rich at Idle Bank
1

Adaptive value < 6.0%

P2195

O2 Sensor Signal Biased/
Stuck Lean Bank 1 Sensor 1

Delta lambda of 2nd lambda
control loop > 0.07-

P2196

O2 Sensor Signal Biased/
Stuck Rich - Bank 1, Sensor 1

Delta lambda of 2nd lambda
control loop < -0.07-

P2231

Delta O2S signal front > 190 uA
O2 Sensor Signal Circuit
Shorted to Heater Circuit Bank
1 Sensor 1

P2237

O2 Sensor Positive Current
Control Circuit / Open - Bank
1, Sensor 1

• O2S voltage signal front 1.49
to 1.51 V
and
• Difference between maximum
and minimum value of O2S
voltage signal front < 32.00 V
and
• Delta lambda controller > 0.10or
• Lambda control at min or max
limit
• O2S voltage signal front 1.49
to 1.51 V
and
• Difference between maximum
and minimum value of O2S
voltage signal front
and
• No reaction on commanded
stepwise change of lambdasetpoint 1

P2243

HO2 Sensor Reference
Voltage Circuit / Open - Bank
1 Sensor 1

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

P2270

HO2 Sensor Signal Biased/
Stuck Lean Bank 1 Sensor 2

• O2S signal rear not oscillating
at reference < 0.63 V
and
• Enrichment after stuck lean
14.99%

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161

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2271

HO2 Sensor Signal Biased/
Stuck Rich Bank 1 Sensor 2

• O2S signal rear not oscillating
at reference < 0.63 V
and
• Enrichment after stuck lean
14.99%
• Sensor voltage ≥ 0.18 V
and
• Number of checks ≥1.0

P2279

Intake Air System Leak

• Offset value throttle mass flow
> 8.00 kg/h
and
• Correction factor > 0.97-

P2293

Fuel Pressure Regulator 2
Performance

• Difference between target
pressure vs. actual pressure,
2.00 MPa

P2294

Fuel Pressure Regulator 2
Control Circuit Open Circuit

Signal voltage 1.40 to 3.20 V

P2295

Fuel Pressure Regulator 2
Control Circuit Low

Signal voltage >1.40 V

P2296

Fuel Pressure Regulator 2
Control Circuit High

Signal voltage > 3.20 V

Ignition System
DTC

Error Message

P2300

Ignition Coil “A” Primary
Control Circuit Low

Signal current > 24.0 mA

P2301

Ignition Coil “A” Primary
Control Circuit High

Signal voltage > 5.10 to 7.00 V

P2303

Ignition Coil “B” Primary
Control Circuit Low

Signal current > 24.0 mA

P2304

Ignition Coil “B” Primary
Control Circuit High

Signal voltage > 5.10 to 7.00 V

P2306

Ignition Coil “C” Primary
Control Circuit Low

Signal current > 24.0 mA

P2307

Ignition Coil “C” Primary
Control Circuit High

Signal voltage > 5.10 to 7.00 V

162

Malfunction Criteria and
Threshold Value

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DTC

Error Message

Malfunction Criteria and
Threshold Value

P2309

Ignition Coil “D” Primary
Control Circuit Low

Signal current > 24.0 mA

P2310

Ignition Coil “D” Primary
Control Circuit High

Signal voltage > 5.10 to 7.00 V

Additional Emissions Regulations
Error Message

Malfunction Criteria and
Threshold Value

P2400

EVAP System Leak Detection
Pump Control Circuit/Open

Signal voltage > 4.40 to 5.60 V

P2401

EVAP System Leak Detection
Pump Control Circuit Low

Signal voltage < 2.15 to 3.25 V

P2402

EVAP System Leak Detection
Pump Control Circuit High

Signal current > 3.00 A

P2403

EVAP System Leak Detection
Pump Sense Circuit/Open

Low signal voltage > 0.50 Sec.

P2404

EVAP System Leak Detection
Pump Sense Circuit Range/
Performance

• High signal voltage > 12..0
Sec.
and
• Number of checks 30.00-.
• Cumulative time of high signal
voltage during pumping
> 50.0 Sec.

P2414

O2 Sensor Exhaust Sample
Error Bank 1, Sensor 1

Threshold 1:
• Signal voltage 3.10 to 4.81V
Threshold 2:
• Signal voltage 2.50 to 3.10V
• Depending on gain factor,
that actual is used for sensor
characteristic, the threshold is
switched

P2539

Low Pressure Fuel System
Sensor Circuit

Signal voltage > 4.9 V

P2541

Low Pressure Fuel System
Sensor Circuit Low

Signal voltage < 0.2 V

P2569

Direct Ozone Reduction
Catalyst Temperature Sensor
Circuit Low

Signal voltage < 0.2 V

P2570

Direct Ozone Reduction
Catalyst Temperature Sensor
Circuit High

Signal voltage > 5.0 V

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163

DTC Chart

DTC

DTC
P2626

164

Error Message
O2 Sensor Pumping Current
Trim Circuit/Open Bank 1
Sensor 1

Malfunction Criteria and
Threshold Value
O2S signal front > 3.2 V

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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
© 2013 Audi of America, Inc.

October 2013