Malfunction Criteria and
Threshold Value

U0402
(only
S4 or
A6

CAN Communication with
TCM

Invalid data received from TCM
• Implausible message

U0404

Invalid Data Received From
Gear Shift Control Module

• If the value of message
counter is permanent,
constant, or change exceeds a
threshold, increment an event
counter
• Maximum change of message
counter > 5

U0415

CAN Link to Vehicle Speed
Sensor Only A6

• Out of range: receiving fault
value 203.5 mph
• Out of range: receiving fault
value > 202.81 mph
• Out of range: receiving fault
value < 1.24 mph

U0415

CAN Link to Vehicle Speed
Sensor Only S4

• Out of range: receiving fault
value 407.22 mph
• Out of range: receiving fault
value > 202.81 mph
• Out of range: receiving fault
value < 1.24 mph

U0422

CAN: Instrument cluster

Ambient temperature value
initialization, Audi 01 h

U0423
CAN
ICL
(only
A6)

Communication with ICL

Invalid data received from ICL
implausible message

U0447

CAN Gateway

Received data from Gateway
implausible message

Fuel and Air Ratios Control Module
DTC

Error Message

Malfunction Criteria and
Threshold Value

P10A0

RFP Powerstage, Signal
Range Check

Engine start completed

P10A4

RFP Actuator, Functional
Check

Engine start completed

P10A5

RFP Sensor, Short to B +

Signal voltage > 4.9 V

254

Audi A5/S5 Quick Reference Specification Book

•

November 2012

Error Message

Malfunction Criteria and
Threshold Value

P10A6

RFP Sensor, Short to Ground
/ Open Circuit

-

P10A7

RFP Sensor, Signal Range
Check at Mechanical Stop
High

Difference actual signal voltage
to learned signal voltage
> 0.05 V

P10A8

RFP Sensor, Signal Range
Check at Mechanical Stop
Low

RFP Signal Voltage in closed
position ≤ 0.35 - ≥ 0.65 V

P1114

Internal Resistance Too Large
(Bank 1, Sensor 2)

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

P12A1

Fuel Rail Pressure Sensor
Inappropriately Low

• Deviation fuel rail pressure
control > 0.060 g/Rev
and
• Deviation HO2S control
< 22.5%

P12A2

Fuel Rail Pressure Sensor
Inappropriately High

• Deviation fuel rail pressure
control < 0.051 g/Rev
and
• Deviation HO2S control > 30%

P12A4

Fuel Rail Pump Control Valve
Stuck Closed

• Deviation fuel rail pressure
control < 0.120 g/Rev
and
• Actual pressure above target
pressure -15 - 15%

P150A

Comparing Engine Off Time
from Instrument Cluster
Control Unit With Engine After
Run Time

• Difference between engine-offtime < - 12 s.
• and ECM after run-time > 12 s.

P2101

Throttle Actuator Control
Motor Circuit Range/
Performance

• Duty cycle > 0.4 s at > 98%
and
• Actual TPS reference point
> 1.5°
• Actual TPS calc value > 0.4 s
at > 8°

P2106

Throttle Actuator Control
System - Short to Battery
Voltage or Ground

ECM power stage failure

P2122

Throttle/Pedal Position
Sensor/Switch D Circuit Low
Input

Signal voltage < 0.4 V

Audi A5/S5 Quick Reference Specification Book

•

November 2012

255

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2123

Throttle/Pedal Position
Sensor/Switch D Circuit High
Input

Signal voltage > 4.82 V

P2127

Throttle/Pedal Position
Sensor/Switch E Circuit Low
Input

Signal voltage < 0.2 V

P2128

Throttle/Pedal Position
Sensor/Switch E Circuit High
Input

Signal voltage > 2.8 V

P2138

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

Signal voltage sensor 1 vs 2,
> 0.24 V

P2146

Fuel Injector Group A Supply
Voltage Circuit / Short to
Ground

Signal current, > 14.90 A

P2147

Injector Circuit Short to
Ground

Signal current > 12 A

P2148

Injector Circuit Short to
Battery Voltage

Signal current > 33 A

P2149

Fuel Injector Group B Supply
Voltage Circuit / Short to
Ground

Signal current > 14.90 A

P2150

Injector Circuit Short to
Ground

Signal current > 12 A

P2151

Injector Circuit Short to
Battery voltage

Signal current > 33 A

P2153

Injector Circuit Short to ground Signal current > 12 A

P2154

Injector Circuit Short to
Battery Voltage

Signal current > 33 A

P2181

Cooling System Performance

• ECT < 75 °C
• Mass air integral 3.5 - 26.0 kg

P2195

O2 Sensor rationality check
high (Bank 1, Bank 2)

HO2S value > 1.1 V

P2196

O2 Sensor Signal Biased/
Stuck Rich (Bank 1, Sensor 1)

HO2S value < 0.9 V

P2197

O2 Sensor Rationality Check
High (Bank 1, Bank 2)

HO2S value > 1.1 V

P2198

O2 Sensor rationality check
Low (Bank 1, Bank 2)

HO2S value < 0.9 V

256

Audi A5/S5 Quick Reference Specification Book

•

November 2012

Error Message

Malfunction Criteria and
Threshold Value

DTC Chart

DTC
P219C

Cylinder Imbalance

• Adaptive value < -10%
or
• > 10%

P219D

Cylinder Imbalance

• Adaptive value < -10%
or
• > 10%

P219E

Cylinder Imbalance

• Adaptive value < -10%
or
• > 10%

P219F

Cylinder Imbalance

• Adaptive value < -10%
or
• > 10%

P21A0

Cylinder Imbalance

• Adaptive value < -10%
or
• > 10%

P21A1

Cylinder Imbalance

• Adaptive value < -10%
or
• > 10%

P2227

Turbocharger/Supercharger
Boost Sensor A Plausibility
Check.

Pressure. difference in crosscheck between boost press.
sensor 1/2; IM pressure,
ambient pressure >7 kPa

P2231

O2 Sensor Signal Circuit
Shorted to Heater Circuit

Delta O2S signal front > 190 uA

P2237

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

Signal activity check-failed

P2240

O2 Sensor Positive Current
Control Circuit / Open (Bank
1, Bank 2)

Signal activity check-failed

P2243

O2 Sensor Reference Voltage
Circuit/Open (Bank 1,
Sensor 2)

• Functional check heater failed
and
• Intrusivive check temperature
measurement failed

Audi A5/S5 Quick Reference Specification Book

•

November 2012

257

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2247

O2 Sensor Nernst Voltage
Open (Bank 1, Bank 2)

• Functional check heater failed
and
• Intrusivive check temperature
measurement failed

P2251

O2 Sensor Signal Open
Circuit (Bank 1, Bank 2)

• Functional check heater failed
and
• Intrusivive check temperature
measurement failed

P2254

O2 Sensor Signal Open
Circuit (Bank 1, Sensor 1)

• Functional check heater failed
and
• Intrusivive check temperature
measurement failed

P2257

Air Pump Relay Short to
Ground

Signal voltage < 2.00 V

P2258

Air Pump Relay Short to
Battery Voltage

Signal current > 5 A

P2270

O2 Circuit Slow Response
(Bank 1, Sensor 2) SULEV

Rationality check, O2S signal
rear, < 0.557 - 0.630 mV

P2271

O2 Circuit (Bank 1, Sensor 2)
SULEV

Rationality check, O2S signal
rear, < 0.557 - 0.630 mV

P2279

Intake Air System Leak

• Threshold to detect a defective
system > 1.33 - 1.6
and
• Ratio of the tie system
defective during the
measurement window to
the whole duration of the
measurement window
> 0.60000

P2293

Fuel Pressure Regulator 2
Performance

• Difference between target
pressure vs. actual pressure,
>1.50mPa
• Difference between target
pressure vs. actual pressure,
< -1.50 mPa

P2294

Fuel Pressure Regulator 2
Control Circuit Open Circuit

Signal current < 0.8 mA

P2295

Fuel Pressure Regulator 2
Control Circuit Low Short to
Ground

Signal voltage < 2.0 V

P2296

Fuel Pressure Regulator 2