Heater voltage 0.0 3.26 V

P0032

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

Signal current > 5.50 A

P0036

HO2S Heater Control Circuit
Bank 1, Sensor 2

Heater voltage 2.34 - 3.59 V

P0037

HO2S Heater Control Circuit
Low Bank 1, Sensor 2

Heater voltage < 2.34 V

236

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Error Message

Malfunction Criteria and
Threshold Value

P0038

HO2S Heater Control Circuit
High Bank 1, Sensor 2

Heater voltage > 2.34 V

P053F

Cold Start Fuel Pressure
Performance

• Difference between target
pressure vs. actual pressure
< -2.00 MpA
• Difference between target
pressure vs. actual pressure
> -2.00 MpA

P0068

MAP/MAF – Throttle Position
Correlation

Load survey below threshold
• Plausibility with fuel system
load calculation < -50%
Load survey above threshold
• Plausibility with fuel system
load calculation > 50%

P0070

Ambient Air Temperature
Sensor Circuit

AAT signal: short to battery /
open circuit failure

P0071

Ambient Air Temperature
Sensor Range/Performance

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

P008A

Out of Range Low

Actual pressure < 950.00 kPa

P008B

Out of Range High

Actual pressure < 40.00 kPa

P0087

Fuel Rail/System Pressure Too Low

• Pressure control activity
> 10.00 mPa
and
• Fuel trim activity 0.90 - 20 [-]
• Difference between target
pressure vs. actual pressure
> -16.38 MPa

P0089

Fuel Pressure Regulator 1
Performance

• Difference between actual
pressure vs. target pressure
> 250.00 kPa
• Difference between target
pressure vs. actual pressure
> 200.00 kPa

P0100

Mass or Volume Air Flow "A"
Circuit

MAF sensor signal 0 µs

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237

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0101

Mass or Volume Air Flow "A"
Circuit Range/Performance

• Mass air flow vs lower
threshold model < 0 - 417 kg/h
• Mass air flow vs upper
threshold > 34 - 873 kg/h
• Load calculation > 23.00%
and
• Fuel system (mult.) < -23.00%
• Load calculation > 19%
and
• Fuel system (mult.) > 23.00%

P0102

Mass or Volume Air Flow "A"
Circuit Low

MAF sensor signal, < 66 µs

P0103

Mass or Volume Air Flow "A"
Circuit High

MAF sensor signal, > 4500 µs

P0111

Intake Air Temperature Sensor • Difference ECT vs. IAT@
1 Circuit Range/Performance
manifold at engine start
Bank 1
> 24.8 K (depending on
engine-off time)
• Difference IAT@maifold vs.
AAT at engine start > 24.8 K
(depending on engine-off time)
• Difference AAT vs. ECT
at engine start < 24.8 K
(depending on engine-off time)

P0112

Intake Air Temperature Sensor Signal voltage < 0.16 V
1 Circuit Low Bank 1

P0113

Intake Air Temperature Sensor Signal voltage > 4.48 V
1 Circuit High Bank 1

P0116

Engine Coolant Temperature
Sensor 1 Circuit Range/
Performance

238

Cross check:
• Difference ECT vs. IAT
at engine start > 24.8 K
(depending on engine off time)
• Difference IAT@ manifold vs.
AAT at engine start < 24.8 K
(depending on engine off time)
• Difference AAT vs. ECT
at engine start > 24.8 K
(depending on engine off time)
• Difference max ECT vs. min
ECT < 1.5 K
• No change on signal < 1.5 K
• Signal in range (lower
threshold) > 89° C
• Signal in range (upper
threshold) < 110° C

Audi A6/S6 Quick Reference Specification Book

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September 2013

Error Message

Malfunction Criteria and
Threshold Value

P0117

Engine Coolant Temperature
Sensor 1 Circuit Low

Engine coolant temperature
> 140°C

P0118

Engine Coolant Temperature
Sensor 1 Circuit High

Engine coolant temperature
< -40°C

P0121

Throttle/Pedal Position
Sensor/Switch "A" Circuit
Range/Performance

• TPS 1 - TPS 2 > 5.10 - 6.30%
and
• Actual TPS 1 -calc. value,
> actual TPS 2 calc. value
or
• TPS 1 calculated value
> 9.00%

P0122

Throttle/Pedal Position
Sensor/Switch "A" Circuit Low

Signal voltage < 0.20 V

P0123

Throttle/Pedal Position
Signal voltage > 4.81 V
Sensor/Switch "A" Circuit High

P013A

O2 Sensor Slow Response Rich to Lean Bank 1 Sensor 2

• Arithmetic filtered max
differential delay time at fuel
cut off > n.a.
• EWMA filtered max differential
delay time at fuel cut off
> 0.7 s
• Number of checks ≥ 3.00

P013B

O2 Sensor Slow Response Lean to Rich Bank 1 Sensor 2

• Arithmetic filtered max
differential delay time at fuel
feed restart > n.a.
• EWMA filtered max differential
delay time at fuel feed restart
≥ 6.0 s
• Number of checks ≥ 3.00

P013E

O2 Sensor Delayed Response • Arithmetic filtered max
- Rich to Lean Bank 1 Sensor
differential delay time at rich
2
to lean transition > n.a. s
• EWMA filtered max differential
delay time at rich to lean
transition > 1.0 s
• Number of checks ≥ 3.00

P013F

2 Sensor Delayed Response Lean to Rich Bank 1 Sensor 2

• Arithmetic filtered max
differential delay time at lean
to rich transition > n.a. s
• EWMA filtered max differential
delay time at lean to rich
transition > 1.5 s
• Number of checks ≥ 3.00

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239

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0130

O2 Sensor Circuit Bank 1,
Sensor 1

O2S ceramic temperature
< 640.0° C

P0131

O2 Sensor Circuit Low
Voltage Bank 1, Sensor 1

Short to ground
Virtual mass (VM) voltage
< 1.75 V
Nernst voltage (UN) < 1.50 V
Adjustment voltage (IA) < 0.30 V
Adjustment voltage (IP) < 0.30 V

P0132

O2 Sensor Circuit High
Voltage Bank 1, Sensor 1

Short to battery:
Virtual mass (VM) voltage
> 3.25 V
Nernst voltage (UN) > 4.40 V
Adjustment voltage (IA) > 7.0 V
Adjustment voltage (IP) > 7.0 V

240

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Error Message

Malfunction Criteria and
Threshold Value

P0133

O2 Circuit Slow Response
Bank 1, Sensor

Symmetric fault:
• Difference of R2L area ratio vs.
L2R area ratio -0.40 - 0.40 [-]
• Max value of both counters
for area ratio R2L and L2R ≥
4 times
Delay Time:
• gradient ratio ≥ 0.00 [-]
• Lower value of both area ratios
R2L and L2R < 0.30 [-]
• Difference of R2L area ratio vs.
L2R area ratio -0.400 - 0.400
Transient Time:
• Gradient ratio ≥ 0.00 [-]
• Gradient ratio ≤ 0.45 [-]
• Lower value of both area ratios
R2L and L2R < 0.30 [-]
• Lower value of both gradient
ratios R2L and L2R < 0.00 [-]
Asymmetric Fault:
• Difference of R2L area ratio
vs. L2R area ratio < -0.40; >
0.40 [-]
• Values of both counters for
area ratio R2L and L2R ≥ 4
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 ≤ 0.45 [-]
• Lower value of both area ratios
R2L and L2R < 0.30 [-]
or
• Lower value of both gradient
ratios R2L and L2R < 0.00 [-]

P0137

O2 Sensor 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

Audi A6/S6 Quick Reference Specification Book

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241

DTC Chart

DTC

DTC

Error Message

Malfunction Criteria and
Threshold Value

P0138

HO2S Short to Voltage
Conditions Bank 1, Sensor 2

Signal voltage > 1.26 V for time
> 5 Sec.

P0140

O2 Sensor Circuit No Activity
Detected Bank 1, Sensor 2

• Signal voltage .40 - .60 V
for time > 3 Sec
or
• Difference in sensor voltage
with load pulse and voltage
without load pulse (mean value
of 3 measurements) ≥ 2.80 V
• Internal resistance > 40000.00
Ohm
• Exhaust temeprature > 600° C

P0141

O2 Heater Circuit Bank 1,
Sensor 2 Malfunction

Heater resistance
> 810 - 4560 Ω

P0169

Incorrect Fuel Composition

• Corrections of fuel mass on
single cylinders incorrect
• Injection cut off incorrect
• Internal check failed
• Correction factor incorrect
• Fuel quantity incorrect
• ABS difference between
predicted and real air mass
> 11.30%

P0171

System Too Lean Bank 1

• Low pass filtered lambda
controller output > 23%
• For time > 25.0 [s]

P0172

System Too Rich Bank 1

• Low pass filtered lambda
controller output < -23%
• For time > 25.0 [s]

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September 2013

DTC

Error Message

Malfunction Criteria and
Threshold Value

Fuel Composition Sensor
Circuit Range/Performance

• Signal frequency < 45.00 Hz
• Number of toggle error events
> 2.00 [-]
• Signal frequency 165.00 195.00 Hz
• Delta ethanol sensor signal >
5.95 [%Eth]
• Within time 200 ms
• Fuel system fault detected
• Delta quotient fuel system
adaptation > 0.08 [-]
• Signal negative pulse length 0
-1 ms
• Signal negative pulse length
> 4 ms
• Signal negative pulse length
< 1 ms
• Diff. ethanol temperature vs.
ECT > 30 - 45° C

P0178

Fuel Composition Sensor
Circuit Low

Signal voltage < 1.0 V

P0179

Fuel Composition Sensor
Circuit High