fuel pressure AUDI A4 2000 B5 / 1.G APB Engine Oxygen Sensor Control Checking Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 2000, Model line: A4, Model: AUDI A4 2000 B5 / 1.GPages: 61, PDF Size: 0.27 MB
Page 11 of 61
24-89
If the specified values in display fields 1
and/or 3 do not match the specifications, or if
the readout does not fluctuate by at least 2
%:
- Check oxygen sensor heater Page 24
-114
.
- Check oxygen sensor signal wire and activation
Page 24
-122
.
- Check intake system for leaks and eliminate
false air Page 24
-76
.
- Check fuel pressure regulator Page 24
-33
.
- Fuel return line kinked or plugged.
-
Press button.
- Press button -0- and -6- to select function "End
Output" and confirm with -Q- button.
- Switch ignition off.
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Page 12 of 61
24-90
Evaluation display group 032 Display group 32
Display fields: 1/3
Possible cause
Corrective action
Oxygen sensor adaptation
values in range:
-4.0 to -25.0 %
Oil thinning- Carry out oil change or carry out
road test on highway
Display fields: 2/4
High oil consumption
Oxygen sensor adaptation
values in range:
-4.0 to -25.0 % Mass Air Flow (MAF) Sensor faulty- Check Mass Air Flow (MAF) Sensor
Page 24
-59
EVAP canister purge regulator valve remains in
stuck in open position - Check EVAP canister purge
regulator valve Page 24
-134
Fuel pressure too highFuel return line kinked or pluged- Check fuel pressure regulator
Page 24
-33
- Check fuel return line
Fuel injector leaking- Check fuel injectors Page 24
-39
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Page 13 of 61
24-91
Evaluation display group 032 Display Group 32
Display fields: 1/3
Possible cause
Corrective action
Oxygen sensor adaptation
values in range:
4.0 and 25.0 %
Un-metered air in intake area- Check intake system for un-metered
air and eliminate leaks
Display field: 2/4
Fuel pressure too low- Check fuel pressure regulator Page
24
-33
Oxygen sensor adaptation
values in range:
4.0 - 25.0 %
Oxygen sensor heater faulty- Check oxygen sensor heater Page
24
-114
Injector not opening or only opening partially - Check injectors Page 24
-39
EVAP canister purge regulator valve remains
in stuck in open position - Check EVAP canister purge
regulator valve Page 24
-134
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