DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0133

O2 Sensor Circ.,Bank1Sensor1 Slow Response

Symmetric fault:
• Difference of R2L area ratio vs.
L2R area ratio -0.40 - 0.40
• Lower value of both counters
for area ratio R2L and L2R ≥
5 times
Delay Time:
• Gradient ratio ≥ 0.50
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.50
• Gradient ratio ≤ 0.55
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.50
Asymmetric fault:
• Difference of R2L area ratio
vs. L2R area ratio NOT (-0.40
- 0.40)
• Values of both counters for
area ratio R2L and L2R ≥ 5
times
Delay Time:
• Gradient ratio ≥ 0.50
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.50)
• Gradient ratio ≤ 0.55
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.50

P0135

O2 Sensor Heater Circ., Bank
1-Sensor 1 Malfunction

• O2S ceramic temperature
< 725°C
and
• Heater duty cycle 90.00%
or
• O2S ceramic temp. < 725° C
and
• Time after O2S heater on 55.0
Sec

292 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0136

O2 Sensor Circ., Bank
1-Sensor 2 Malfunction

• Delta O2S signal rear > 2 V
• Number of heater coupling
faults > 4

P0137

O2 Sensor Circ., Bank
1-Sensor 2 Low Voltage

• 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 Sensor Circ., Bank
1-Sensor 2 High Voltage

Signal voltage > 1.08 V for
> 5 Sec.

P0139

O2 Sensor Circ., Bank
1-Sensor 2 Slow Response

• O2S rear signal not oscillating
at reference 635 to 659 mV
• O2S signal rear during fuel cut
off > 200 mV

P013A

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

• Arithmetric filtered max
differential transient time at
fuel cut off >= 0.5 Sec
and
• Number of checks ≥ 3.00

P013C

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

• Arithmetric filtered max
differential transient time at
fuel cut off >= 0.5 Sec
and
• Number of checks ≥ 3.00

P0140

O2 Sensor Circ., Bank 1
• Signal voltage 0.40 to 0.60 V
-Sensor 2 No Activity Detected • for time > 3.0 Sec
and
• Difference of sensor voltage
with load pulse and voltage
without load pulse (mean value
of 3 measurements) ≥ 2.80 V
or
• internal resistance > 40000 O
and
• Exhaust temperature > 700° C

P0141

O2 Sensor Heater Circ., Bank
1-Sensor 2 Malfunction

Heater resistance 500 10000 Ω

P0150

O2 Sensor Circ., Bank
2-Sensor 1 Malfunction

O2S ceramic temperature
< 690° C

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 293

DTC Chart

DTC

DTC
P0151

Error Message
O2 Sensor Circ., Bank
2-Sensor 1 Low Voltage

Malfunction Criteria and
Threshold Value
Short to ground
Virtual mass (VM) < 1.75 V
Nernst voltage (UN) < 1.50 V
Adjustment voltage (IP) < 0.30 V

P0152

O2 Sensor Circ., Bank
2-Sensor 1 High Voltage

Short to battery
Virtual mass (VM) > 3.25 V
Nernst voltage (UN) > 4.40 V
Adjustment voltage (IP) > 7.00 V

294 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0153

O2 Sensor Circ., Bank
2-Sensor 1 Slow Response

Symmetric fault:
• Difference of R2L area ratio vs.
L2R area ratio -0.40 - 0.40
• Lower value of both counters
for area ratio R2L and L2R ≥
5 times
Delay Time:
• Gradient ratio ≥ 0.50
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.50
• Gradient ratio ≤ 0.55
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.50
Asymmetric fault:
• Difference of R2L area ratio
vs. L2R area ratio NOT (-0.40
- 0.40)
• Values of both counters for
area ratio R2L and L2R ≥ 5
times
Delay Time:
• Gradient ratio ≥ 0.50
• Lower value of both area ratios
R2L and L2R < 0.30
Transient Time:
• Gradient ratio ≥ 0.50)
• Gradient ratio ≤ 0.55
• Lower value of both area ratios
R2L and L2R < 0.30
or
• Lower value of both gradient
ratios R2L and L2R < 0.50

P0155

O2 Sensor Heater Circ., Bank
2-Sensor 1 Malfunction

• O2S ceramic temperature
< 725 °C
and
• Heater duty cycle > 90.00%
or
• O2S ceramic temperature
< 725° C and
• Time after O2S heater on 55.0
Sec

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 295

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0156

O2 Sensor Circ., Bank
2-Sensor 2 Malfunction

• Delta O2S signal rear > 2 V
• Number of heater coupling
faults > 4

P0157

O2 Sensor Circ., Bank
2-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 Sensor Circ., Bank
2-Sensor 2 High Voltage

Signal voltage > 1.08 V for time
> 5.0 Sec

P0159

O2 Sensor Circ., Bank
2-Sensor 2 Slow Response

• O2S rear signal not oscillating
at reference 635 to 659 mV
• O2S signal rear during fuel cut
off > 200 mV

P0160

O2 Sensor Circ., Bank
2-Sensor 2 No Activity
Detected

• 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) ≥ 2.80 V
or
• Internal resistance > 40000 Ω
and
• Exhaust temperature > 700° C

P0161

O2 Sensor Heater Circ., Bank
2-Sensor 2 Malfunction

Heater resistance > 500 10000Ω

P0169

Electronic Throttle Control
Module

• Comparison with fuel quantity
incorrect
• Internal check failed
• Correction factor incorrect
• Fuel quantity incorrect

P0171

Fuel System Additive Bank 1
Bank 2
Fuel System Multiplicative
Bank 1 Bank 2

Adaptive value > 5%

Fuel System additive Bank 1
Bank 2
Fuel System multiplicative
Bank 1 Bank 2

Adaptive value < 5%

P0172

Adaptive value > -20%

Adaptive value < -20%

296 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

P0174

Error Message

Malfunction Criteria and
Threshold Value

Fuel System Additive Bank 1
Bank 2
Fuel System multiplicative
Bank 1 Bank 2

Adaptive value > 5%

Fuel System additive Bank 1
Bank 2
Fuel System Multiplicative
Bank 1 Bank 2

Adaptive value < 5%

P0190

Fuel Rail Pressure Sensor "A"
Circuit

Signal voltage > 4.8 V

P0191

Fuel Rail Pressure Sensor

Rail pressure > 13.5 mPa

P0192

Fuel Rail Pressure Sensor "A"
Circuit Low Input

Signal voltage < 0.20 V

P0201

Injector Circuit/Open Cylinder 1

Internal logic failure

P0202

Injector Circuit/Open Cylinder 2

Internal logic failure

P0203

Injector Circuit/Open Cylinder 3

Internal logic failure

P0204

Injector Circuit/Open Cylinder 4

• Internal logic failure

P0205

Injector Circuit/Open Cylinder 5

• Internal logic failure

P0206

Injector Circuit/Open Cylinder 6

• Internal logic failure

P0207

Injector Circuit/Open Cylinder 7

• Internal logic failure

P0208

Injector Circuit/Open Cylinder 8

• Internal logic failure

P0209

Injector Circuit/Open Cylinder 9

Internal logic failure

P0210

Injector Circuit/Open Cylinder 10

Internal logic failure

P0211

Injector Circuit/Open Cylinder 11

Internal logic failure

P0212

Injector Circuit/Open Cylinder 12

Internal logic failure

P0175

Adaptive value > -20%

Adaptive value < -20%

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 297

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0221

Throttle Position Sensor 2
Bank 1 Bank 2

• TPS 1 - TPS 2 > 6.30%
• Actual TPS 2 - calc. value
> actual TPS 1 - calc. value
or
• Actual TPS 2 - calc. value
> 9%

P0222

Throttle Position Sensor 2
Bank 1 Bank 2

Signal voltage < 0.215 V

P0223

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

Signal voltage > 4.81 V

P0261

Injection Valves - Low Side
Cylinder #1

Signal current < 2.10 A

P0262

Injection Valves - High Side
Cylinder #1

Short to battery plus (low side)
• Signal current > 14.70 A

P0264

Injection Valves - Low Side
Cylinder #2

Signal current < 2.10 A

P0265

Injection Valves - High Side
Cylinder #2

Short to battery plus (low side)
• Signal current > 14.70 A

P0267

Injection Valves - Low Side
Cylinder #3

Signal current < 2.10 A

P0268

Injection Valves - High Side
Cylinder #3

Short to battery plus (low side)
• Signal current > 14.70 A

P0270

Injection Valves - Low Side
Cylinder #4

Signal current < 2.10 A

P0271

Injection Valves - High Side
Cylinder #4

Short to battery plus (low side)
• Signal current > 14.70 A

P0273