1999 AUDI A4 sensor

01-240
Notes on display field 1:
Display field 1 shows which diagnosis has been carried out or has not been carried out yet. If the three way catalytic converter
diagnosis is carried out inside the engine control module, but the heated oxygen sensor diagnosis has not been carried out
yet, the three way catalytic converter diagnosis is not evaluated and therefore the deterioration rate is not set in display
groups 035 and 036.
Value "0" = Diagnosis carried out
Value "1" = Diagnosis not carried out X

X

X
X
X
X
Meaning of 6-digit display

1 = Diagnosis flank fall time, bank 1, heated oxygen sensor 1

2 = Diagnosis flank rise time, bank 1, heated oxygen sensor 1

3 = Diagnosis flank fall time, bank 2, heated oxygen sensor 1

4 = Diagnosis flank rise time, bank 2, heated oxygen sensor 1

5 = ----------

6 = Three way catalytic converter diagnosis, bank 1

7 = ----------

8 = Three way catalytic converter diagnosis, bank 2
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01-241
Notes on display field 3 and 4:
Value "0" = Diagnosis condition not fulfilled
Value "1" = Diagnosis condition fulfilled X
X
X
X
X
X
X
X
Meaning of 8-digit display "Diagnosis condition 1"

1 = Coolant temperature: 70 - 110 C ( display group 001)
2 = Oxygen sensor heating (all four O2S heaters; display group 040)
3 = Momentary constant drive

4 = No fuel enrichment (during diagnosis no enrichment can occur)

5 = Long-term constant drive

6 = Closed throttle position switch open ( display group 002)
7 = Oxygen sensor control, bank 2 active ( display group 008)
8 = Oxygen sensor control, bank 1 active ( display group 007)
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01-242

X
X
X
X
X
X
X
X
Meaning of 8-digit display "Diagnosis Condition 2"

1 = Three way catalytic converter diagnosis, bank 2 active

2 = Engine load: 27 - 66% ( display group 003 )
3 = Engine speed: 1800 - 2700 RPM ( display group 003)
4 = Vehicle speed: 80 - 100 km/h (50 - 63 mph) ( display group 003)
5 = Three way catalytic converter diagnosis, bank 1 active

6 = Value does not drop below or exceed oxygen sensor control limit ( display group 007
and/or 008)
7 = Intake air mass through Mass Air Flow (MAF) sensor: 12 - 36 g/sec ( display group 019)

8 = Calculated exhaust gas temperature in three way catalytic converter: 400 - 640 C (752 -
1184 F)
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01-244
Display group 099 Display
shows Display/specified
value Designation/diagnosis
Basic
setting 99
1 2 3 4 ... RPM 1 = Momentary engine speed Display group 003, display field 1 ...% 2 = Momentary engine load display group 003, display field 2
... C
3 = Coolant temperature display group 001, display field 1

-Control OFF
and/or
-Control ON
4 = Oxygen sensor control OFF in "Basic Setting" function 04; Oxygen sensor control
ON in "Read Measuring Value Block" function 08
Notes on display field 4:

For defined troubleshooting, the oxygen sensor control is switched off when display group 099 is selected under "Basic
Setting" function 04, and switched on when display group 099 is selected under "Read Measuring Value Block"function
08. When leaving "Basic Setting" function 04, oxygen sensor control is automatically active again.
You can switch back and forth between "Basic Setting" function 04 and "Read Measuring Value Block" function 08 by
pressing buttons -4- and -8- on the VAG 1551 scan tool.
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01-246

8D0906266 2.8l V6/2V MPI OBD2
D01
Coding 01051
WSC 06388

ECM identification and entered coding (e.g. 01051) are shown.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -6- to select "End Output" function 06.
Rapid data transfer
Q
06 - End Output

Indicated on display
- Press -Q- button to confirm input.
Rapid data transfer
HELP
Insert address word XX

Indicated on display
Notes:
The ECM uses the coding that is entered and displayed only after the
ignition has been switched off once. Incorrect coding leads to:
Driving performance problems (jerky shifting, rough load change, etc.)Increased fuel consumptionElevated exhaust gas valuesDecrease in transmission service lifeStoring of malfunctions that are not present in DTC memoryFunctions are not carried out (oxygen sensor control, triggering of the
EVAP canister system, etc.).
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01-264
If, during regeneration of the readiness code, the
trip status display is set to "1" but the
corresponding readiness code display is not set
to "0" the diagnosis was carried out but not
recognized as OK by the ECM.
In this case, DTC memory should be checked for
malfunctions and/or to carry out a selective
diagnosis:

- For three way catalytic convertor diagnosis
(bank 1 and bank 2), also check display groups
035, 036 and 044.

- For EVAP system leak diagnosis, also check
display group 030.

- For heated oxygen sensor diagnosis, also check
display groups 032, 033, 034, 041, 042 and 043.

- For oxygen sensor heating diagnosis, also
check display group 040.

- For Exhaust Gas Recirculation (EGR)
throughput diagnosis, also check display group
017.
Pa
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yp
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pair&id=AUDI.B5.FU01.01.1