P0050

HO2S Heater Control Circuit
High (Bank 2, Sensor 1) Short
to Battery Voltage

Heater current < 8 - < 40 mA

P0051

HO2S Heater Control Circuit
Low (Bank 1, Sensor 1) Short
to Ground

Heater voltage < 1.9 - < 2.22 V

P0052

HO2S Heater Control Circuit
High (Bank 2, Sensor 1) Short
to Battery Voltage

Heater current > 8 - > 11 A

P0056

HO2S Heater Control Circuit
(Bank 1, Sensor 2) Open
Circuit

Heater current < 8 - < 40 mA

Audi A6/S6 Quick Reference Specification Book

•

September 2013

DTC Chart

DTC

259

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0057

HO2S Heater Control Circuit
Low (Bank 1, Sensor 2) short
to Ground

Heater voltage < 1.9 - < 2.22 V

P0058

HO2S Heater Control Circuit
High (Bank 1, Sensor 2) Short
to Battery Voltage

Heater current > 3 - > 5 A

P0068

MAP/MAF – Throttle Position
Correlation

• Plausibility with fuel system
load calculation < -43%
• Plausibility with fuel system
load calculation > 43%

P0071

Ambient Air Temperature
Sensor Circuit Range/
Performance

• Difference AAT vs. ECT vs.
CHDT at engine start
< 26.5 °C
and
• Difference IAT vs. CHDT at
engine start > 26.5 °C
and
• Difference IAT vs. AAT at
engine start < 26.5 °C
and
• Difference IAT vs. ECT at
engine start > 26.5 °C

P0072

Ambient Air Temperature
Sensor Circuit Low

Failure

P0073

CAN Communication with
Ambient Air Temperature
Sensor

Failure

P007C

Intake Air Temperature Sensor
after Intercooler 1

Intake Air Temperature > 129 °C

P007D

Intake Air Temperature Sensor
after Intercooler 1

Intake Air Temperature < -40 °C

P0087

Fuel Rail/System Pressure Too Low

• Deviation fuel rail pressure
control > 3.5 MPa
and
• Lambda controller output (no
map, just bottom and top limit)
-15 - 15%

P0089

Fuel Pressure Sensor 1
Performance

• Deviation fuel pressure control
(LP) < -28%
• Target pressure-actual
pressure > 0.17 MPa
• Target pressure-actual
pressure < -0.17 MPa

260

Audi A6/S6 Quick Reference Specification Book

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September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0090

Fuel Rail Pressure Control
Valve, Open Circuit

Signal current < 0.8 mA

P0091

Fuel Rail Pressure Control
Valve, Short to Ground

Signal Voltage < 2.0 V

P0092

Fuel Rail Pressure Control
Valve, Open Circuit

Signal current > 11 A

P0096

Intake Air Temperature Sensor
2 Circuit Bank 1 Range/
Performance

• Difference AAT vs. ECT vs.
CHDT at engine start
< 26.5 °C
and
• Difference IAT vs. CHDT at
engine start > 26.5 °C
and
• Difference IAT vs. AAT at
engine start < 26.5 °C
and
• Difference IAT vs. ECT at
engine start > 26.5 °C

P0111

Intake Air Temperature Sensor
1 Rationality Check S4 Only

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

P0112

Intake Air Temperature Sensor
1 Circuit Low Input

Intake air temperature > 129 °C

P0113

Intake Air Temperature Sensor
1 Circuit High Input

Intake air temperature < -40 °C

Audi A6/S6 Quick Reference Specification Book

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September 2013

261

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0116

Engine Coolant Temperature
Sensor 1 Circuit Range/
Performance. (Stuck)

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

P0117

Engine Coolant Temperature
Sensor 1 Circuit Low Input

Engine coolant temperature
> 141 °C

P0118

Engine Coolant Temperature
Sensor 1 Circuit Open

Engine coolant temperature
< -45.8 °C

P0121

Throttle/Pedal Position Sensor • TPS 1 - TPS 2 > 5.79%
A Circuit Range/Performance
and
• Relative mass air integral >
100 at 0.45 s

P0122

Throttle/Pedal Position Sensor Signal voltage < 0.117 V
A Circuit Low Input

P0123

Throttle/Pedal Position Sensor Signal voltage > 4.6 V
A Circuit High Input

P012B

Turbocharger/Supercharger
Inlet Pressure Sensor Circuit
Range/Performance

Pressure difference in cross
check between boost pressure
sensor 1/2; inlet charger
pressure and ambient pressure
sensor > 7 kPa

P012C

Turbocharger/Supercharger
Inlet Pressure Sensor Circuit
Low

Signal voltage < 0.2 V

P012D

Turbocharger/Supercharger
Inlet Pressure Sensor Circuit
High

Signal voltage > 4.8 V

P0130

O2 Sensor Circuit (Bank 1,
Sensor 1)

O2S ceramic temperature
< 640°C

P0131

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

Virtual mass < 0.13 V

P0132

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

Signal voltage > 5.5 V

262

Audi A6/S6 Quick Reference Specification Book

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September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0133

O2 Circuit Slow Response
(Bank 1, Sensor 1)

Lambda value > 0.9004

P0135

O2 Heater Circuit (Bank 1,
Sensor 1)

UEGO ceramic temperature
< 680 or > 965 °C

P0136

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

P0137

O2 Circuit Low Voltage (Bank
1, Sensor 2)

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

P0138

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 Bank1-Sensor2
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 A6/S6 Quick Reference Specification Book

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September 2013

263

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