HO2S Heater Control Circuit
High (Bank 1, Sensor 1) Short
to B+

Heater current > 5.50 A

P0056

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

Signal voltage 2.34 - 3.59 V

P0057

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

Heater voltage < 2.34 V

P0058

HO2S Heater Control Circuit
High (Bank 1, Sensor 2) Short
to B+

Signal current > 3.59 A

P0070

Ambient air temp sensor short
to B+

Failure

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Error Message

Malfunction Criteria and
Threshold Value

P0071

Ambient Air Temperature
Sensor Circuit Range/
Performance

• Difference ECT vs. IAT at
engine start < 24.8 - 39.8 K
and
• Difference IAT vs. AAT at
engine start > 24.8 - 39.8 K
and
• Difference AAT vs. ECT at
engine start > 24.8 - 39.8 K
(depending on engine off time)

P0072

Ambient Air Temp Sensor
Short to Ground

Failure

P0087

Fuel Rail/System Pressure Too Low

• Pressure < 0.80 MPa

P0088

Fuel Rail/System Pressure Too High

Pressure > 1 MPa

P0089

Fuel Pressure Regulator 1
Performance

• Difference between actual
pressure - target pressure
> 200 kPa
• Pressure control activity -350
kPa - 350 kPa

P0106

Manifold Absolute Pressure/
BARO Sensor Range/
Performance

Boost pressure signal
• Manifold pressure signal:
variation between state
1 and 2 < 5.00 [kPa]

P0107

Manifold Absolute Pressure or
Bar. Pressure Low Input

• Signal voltage < 0.20 V
Range check:
• Manifold pressure signal
< 8.00 kPa

P0108

Manifold Absolute Pressure or
Bar. Pressure High Input

• Signal voltage > 4.80
Range check:
• Manifold pressure signal
> 170.00 kPa

P0111

Intake Air Temperature Sensor • Difference ECT vs. IAT at
1 Rationality Check
engine start > 24.8 - 39.8 K
• (depending on engine off time)
and difference IAT vs. AAT at
engine start > 24.8 - 39.8 K
• (depending on engine off time)
and diff. AAT vs. AAT at engine
start > 24.8 - 39.8 K

P0112

Intake Air Temperature Sensor Signal voltage < 0.15 V
1 Circuit Low Input

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271

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0113

Intake Air Temperature Sensor Signal voltage > 4.50 V
1 Circuit High Input

P0116

Engine Coolant Temperature
Sensor 1 Circuit Range/
Performance

•Difference ECT vs. IAT at
engine start > 24.8 - 39.8 K
and
• Difference IAT vs. AAT at
engine start < 24.8...39.8 K
and
• AAT vs. ECT at engine start
< 24.8...39.8 K (depending on
engine off time)

P0117

Engine Coolant Temperature
Sensor 1 Circuit Low Input

Engine coolant temperature
> 140°C

P0118

Engine Coolant Temperature
Sensor 1 Circuit Open

Engine coolant temperature
< 40°C

P0121

Throttle/Pedal Position Sensor • TPS 1 - TPS 2 > 6.30%
A Circuit Range/Performance
and
• TPS 1 calculated value
> 9.00%

P0122

Throttle/Pedal Position Sensor Signal voltage < 0.18 V
A Circuit Low Input

P0123

Throttle/Pedal Position Sensor Signal voltage > 4.63 V
A Circuit High Input

P0130

O2 Sensor Circuit (Bank 1,
Sensor 1) Malfunction

Sensor element temperature
< 690° C

P0131

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

Virtual mass < 1.75 V
Nernst voltage < 1.50 V
Adjustment voltage < 0.30 V

P0132

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

Virtual mass > 3.25 V
Nernst voltage > 4.40 V
Adjustment voltage > 7 V

272

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P0133

Error Message
O2 Circuit Slow Response
(Bank 1, Sensor 1)

Malfunction Criteria and
Threshold Value
Symmetric fault:
• Difference of R2L area ratio vs.
L2R area ratio -0.50 - 0.50
• Maximum value of both
counters for area ratio R2L
and L2R > 5 times
Delay Time:
• Gradient ratio ≥ 0.00
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.00
• Gradient ratio ≤ 0.00
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.00
ASYMMETRIC FAULT
• Difference of R2L area ratio
vs. L2R area ratio NOT (-0.50
- 0.50)
• Values of both counters for
area ratio R2L and L2R ≥ 5
times
Delay Time:
• Gradient ratio ≥ 0.00
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.00
• Gradient ratio ≤ 0.00
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.00

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273

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0135

O2 Heater Circuit (Bank 1,
Sensor 1)

Out of range high
• O2S ceramic temperature
< 725°C
and
• Heater duty cycle 90.00%
Rationality check (sensor
heating up)
• O2S ceramic temperature
< 725°C
and
• Time after O2S heater on 35.0
Sec.

P0137

O2 Circuit Low Voltage (Bank
1, Sensor 2)

• Signal voltage < 0.06 V for
time > 3 Sec.
and
• Difference of sensor voltage
with load pulse and voltage
without load pulse (mean value
of 3 measurements) < 0.01 V

P0138

O2 Circuit High Voltage (Bank
1, Sensor 2)

Signal voltage > 1.08 V for
> 5 Sec.

P013A

O2 Sensor Bank 1 Sensor 2
Slow Response - Rich to Lean

• EWMA filtered max differential
transient time at fuel cut off
≥ 0.5 Sec
and
• Number of checks ≥ 3.00
(initial phase and step
function)

P013C

O2 Sensor Bank 2 Sensor 2
Slow Response - Rich to Lean

• EWMA filtered max differential
transient time at fuel cut off
≥ 0.5 Sec
and
• Number of checks ≥ 3.00
(initial phase and step
function)

P0140

O2 Sensor Circuit (Bank
1-Sensor 2) No Activity
Detected

• Signal voltage 0.40 - 0.60 V for
> 3 Sec
and
• Difference in sensor voltage
with load pulse and voltage
without load pulse (mean value
of 3 measurements) ≥ 2.80 V

P0140

O2S Signal Check - Circuit
Continuity (sensor ground line
open circuit)

• Internal resistance > 40,000 Ω
and
• Exhaust temperature > 600° C

274

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Error Message

Malfunction Criteria and
Threshold Value

P0141

O2 Heater Circuit
(Bank 1, Sensor 2) Out of
Range

Heater resistance
1000 - 6500 Ω

P0150

O2 Sensor Circuit (Bank 1,
Sensor 1)

Sensor element temperature
< 690° C

P0151

O2 Sensor Circuit, (Bank 1
Bank 2) Low Voltage

Virtual mass < 1.75 V

DTC Chart

DTC

Nernst voltage < 1.50 V
Adjustment voltage < 0.30 V

P0152

O2 Sensor Circuit, (Bank 1
Bank 2) High Voltage

Virtual mass > 3.25 V
Nernst voltage > 4.40 V
Adjustment voltage > 7.00 V

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275

DTC
P0153

276

Error Message
O2 Circuit Slow Response
(Bank 1, Bank 2)

Malfunction Criteria and
Threshold Value
SYMMETRIC FAULT:
• Difference of R2L area ratio vs.
L2R area ratio -0.50 - 0.50
• Max value of both counters for
area ratio R2L and L2R
5 times
Delay Time:
• Gradient ratio ≥ 0.00
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.00
• Gradient ratio ≤ 0.00
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.00
ASYMMETRIC FAULT:
• Difference of R2L area ratio vs.
L2R area ratio NOT
(-0.50 - 0.50)
• values of both counters for
area ratio R2L and L2R
≥ 5 times
• Delay Time:
• gradient ratio ≥ 0.00
• lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• gradient ratio ≥ 0.00
• gradient ratio ≤ 0.00
• lower value of both area ratios
R2L and L2R < 0.30
or
• lower value of both gradient
ratios R2L and L2R < 0.00

Audi A5/S5 Quick Reference Specification Book

•

November 2012

Error Message

Malfunction Criteria and
Threshold Value

P0155

O2 Sensor Heater Circuit
Out of range high
(Bank 2-Sensor 1) Malfunction • O2S ceramic temperature
< 725° C
and
• Heater duty cycle > 90.00%
Rationality check (sensor
heating up)
• O2S ceramic temperature
< 725° C
and
• Time after O2S heater on 35.0
Sec

P0157

O2 Sensor Circuit (Bank
1-Sensor 2) Low Voltage

• Signal voltage < 0.06 V for
time > 3.0 Sec
and
• Difference of sensor voltage
with load pulse and voltage
without load pulse (mean value
of 3 measurements) < 0.01 V

P0158

O2 Circuit (Bank 1, Sensor 2)
High Voltage

Signal voltage > 1.08 V for time
> 5.0 Sec

P0160

O2 Circuit No Activity
Detected (Bank 1, Sensor 2)

• Signal voltage 0.40 - 0.60 V for
time > 3.0 Sec
and
• Difference of sensor voltage
with load pulse and voltage
without load pulse (mean value
of 3 measurements) ≥ 2.8 V

P0160

O2S Signal Check - Circuit
Continuity (sensor ground line
open circuit)

• Internal resistance > 40,000 Ω
and
• Exhaust temperature > 600° C

P0161

O2 Heater Circuit (Bank 1,
Sensor 2) Out of Range