P0491

Secondary Air Injection
System (Bank 1) Insufficient
Flow

• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.10
and
• Relative AIR pressure
measured ≤ 2.00 kPa
or
• Blockage: relative AIR
pressure measured with AIR
pressure sensor vs. modeled
< 0.27
• Leakage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.27
and
• Relative AIR pressure
measured ≤ 2.00 kPa
or
• Average pressure difference
between absolute value and
filtered < 0.30 - 1.00 kPa
and
• Relative AIR pressure
measured ≤ 2.00 kPa

P0492

Secondary Air Injection
System (Bank 2)

Blockage: relative AIR pressure
measured with AIR pressure
sensor vs. modeled < 0.10

DTC

Error Message

Speed and Idle Control
Malfunction Criteria and
Threshold Value

P0501

Vehicle Speed Sensor A
Range/Performance

VSS signal < 4 km/h

P0506

Idle Air Control System - RPM
Lower Than Expected

• Engine speed deviation < -80
RPM
and
• RPM controller torque value
≥ calculated max value
• Integrated deviation of engine
speed low and integrated
deviation of engine speed high
> 2000 RPM

Audi A5/S5 Quick Reference Specification Book

•

November 2012

287

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0507

Idle Air Control System - RPM
Higher Than Expected

• Engine speed deviation
> -80 RPM
and
• RPM controller torque value ≤
calculated min. value

P0597

Thermostat Heater Control
Circuit Open

Signal voltage 4.70...5.40 V

P0598

Thermostat Heater Control
Circuit Low

Signal voltage 0.0...3.25 V

P0599

Thermostat Heater Control
Circuit High

Signal current > 2.20 A

P050A

Cold Start Idle Air Control
System Performance

RPM lower:
• Engine speed deviation
> 200 RPM
and
• RPM controller torque value
≥ calculated max. value
RPM Higher:
• Engine speed deviation < -200
RPM
and
• RPM controller torque value
≤ calculated min. value

P050B

Cold Start Idle Air Control
System Performance

Difference between commanded
spark timing vs. actual value >
0.25%

P052A

Cold Start “A” Camshaft
Position Timing OverAdvanced

Difference between target
position vs. actual position
> 3.50°CRK

P052C

Cold Start “A” Camshaft
Position Timing OverAdvanced

Difference between target
position vs. actual position
> 5°CRK

P053F

Fuel Rail Control Valve High
Pressure Side

• Difference between target
pressure-actual pressure
>1.30 MPa
or
• Difference between target
pressure vs. actual pressure
< -3.00 mPa

P054A

Cold Start “B” Camshaft
Position Timing OverAdvanced

Difference between target
position vs. actual position
> 5°CRK

288

Audi A5/S5 Quick Reference Specification Book

•

November 2012

P054C

Error Message
Cold Start “B” Camshaft
Position Timing OverAdvanced

Malfunction Criteria and
Threshold Value

DTC Chart

DTC

Difference between target
position vs. actual position
> 5°CRK

Control Module and Output Signals
DTC

Error Message

Malfunction Criteria and
Threshold Value

P0606

ECM Processor

• Signal gradient, out of range
> 7.5 kPa/s or 4.80 V or < 0.20 V
• Measured ambient pressure,
out of range > 115 kPa or
< 45 kPa.

P0634

PCM/ECM/TCM Internal
Temperature Too High

Signal range check over
temperature > 150° C

P0638

Throttle Actuator Control
Range/Performance (Bank 1)

Rationality check:
• Time to close to reference
point > 0.6 Sec.
and
• Reference point 2.88%
Rationality check:
• Time to open over reference
point > 0.1 Sec
or
• Time to close below reference
point > 0.6 Sec
Signal range check at
mechanical stop low
• TPS 1 signal voltage ≠
0.40 - 0.80 V
or
• TPS 2 signal voltage ≠ 4.20 4.60 V

P0641

Sensor Reference Voltage A
Circuit/Open

Signal voltage deviation
> ± 0.3 V

P0651

Sensor Reference Voltage B
Circuit/Open

Signal voltage deviation
> ± 0.3 V

P0657

Actuator Supply Voltage A
Circuit/Open

Signal voltage > 4.4 - 5.6 V

P0658

Actuator Supply Voltage A
Circuit Low

Signal voltage < 2.15 - 3.25 V

Audi A5/S5 Quick Reference Specification Book

•

November 2012

289

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0659

Actuator Supply Voltage A
Circuit High

Signal current > 1.1 A

P0697

Sensor Reference Voltage C
Circuit/Open

Signal voltage deviation
> ± 0.3 V

P062B

Internal Control Module Fuel
Injector Control Performance

SPI communications check
identifier failure

U0001

High Speed CAN
Communication Bus

CAN message, no feedback

U0002

High Speed CAN
Communication Bus

Global time out receiving no
messages

U0101

Lost Communication with TCM No CAN message received from
TCM

U0121

Lost Communication With
Anti-Lock Brake System
(ABS) Control Module

Received CAN message no
message

U0140

CAN communication with
Body Control Module

Time out no message

U0146

Lost Communication With
Gateway “A”

Received CAN message no
message

U0155

Lost Communication With
Instrument Panel Cluster
(IPC) Control Module

Received CAN message - no
message

U0302

Software Incompatibility with
Transmission Control Module

Manual transmission vehicle,
ECM coded as automatic
transmission vehicle

U0323

Software Incompatibility With
Instrument Panel Control
Module

Ambient temperature value
module not encoded for ambient
temp sensor, FDh

U0402

Invalid Data Received From
Transmission Control Module

Invalid data received from TCM
• Implausible message

U0415

Invalid Data Received From
Anti-Lock Brake System
Control Module

Speed sensor signal 407.296
MPH

U0422

Invalid Data Received From
Body Control Module

Ambient temperature value
initialization, FEh

U0423

Invalid Data Received From
Instrument Panel Cluster
Control Module

Received data implausible
message

U0447

Invalid Data Received From
Gateway “A”

Received data from Gateway
implausible message

290

Audi A5/S5 Quick Reference Specification Book

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November 2012

Fuel and Air Ratios Control Module
Error Message

Malfunction Criteria and
Threshold Value

DTC Chart

DTC
P12A1

Fuel Rail Pressure Sensor
Inappropriately Low

• Pressure control activity
> 0.25 MPa
and
• Fuel trim activity < 0.85

P12A2

Fuel Rail Pressure Sensor
Inappropriately High

• Pressure control activity
> 0.25 MPa
and
• Fuel trim activity < 0.85

P129B

Fuel Pressure Regulator Valve • Open circuit signal voltage
Bank 2 Open Circuit
1.40 - 3.20 Vr
• Rationality check signal pattern
incorrec

P129C

Fuel Pressure Regulator
Valve Bank 2 Short Circuit to
Ground

P129D

Fuel Pressure Regulator Valve Short to battery plus signal
Bank 2 Short Circuit to B+
voltage > 3.20 V

Signal voltage 1.40 - 3.20 V

P13EA Cold Start Ignition Timing
Performance Off Idle

Difference between commanded
spark timing and actual value
> 0.60%

P150A

Engine Off Time Performance

Comparison of engine off time
from instrument cluster control
unit with engine after run time.
• Difference between engine off
time and ECM after run time
< -12.0 Sec.
Comparison of engine off time
from instrument cluster control
unit with engine after run time
• Difference between engine off
time and ECM after run time
> 12.0 Sec.

P2101

Throttle Actuator Control
Motor Circuit Range/
Performance

Signal range check
• Duty cycle >80%
and
• ECM power stage, no failure
Rationality check
• Deviation throttle valve angles
vs. calculated value 4.0 50.0%

Audi A5/S5 Quick Reference Specification Book

•

November 2012

291

DTC

Error Message

Malfunction Criteria and
Threshold Value

P2106

Throttle Actuator Control
System Forced Limited Power

Short to battery plus/ short to
ground
• Internal check failed
Open circuit
• Internal check failed
Temperatur / current monitoring
• Internal check failed
Functional check
• Internal check failed

P2108

Throttle Actuator Control
Module Performance

TPS 1 signal voltage NOT
(0.21 - 0.87) V

P2119

Throttle Actuator Control
Throttle Body Range/
Performance

TPS 1 signal voltage NOT (0.21
- 0.87) V

P2122

Throttle/Pedal Position
Sensor/Switch D Circuit Low
Input