Volkswagen Passat 1995 Official Factory Repair Manual page 1869

Multiport fuel injection and ignition system
Evaluating display group 025
Display group:
025
Display field: 2 +
3
Adaption values
in range: -5 to -
16.4%
Adaptation values
in range: 5 to
16.4%
Adaptation
values: constant
0.0%
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Possible malfunction cause
Crankcase dilution: When the partial load
adaptation value (display field 2) is normal
Fuel pressure too high
Fuel injector leaking
O2S heating
Unmetered air in air intake system or
exhaust manifold/front pipe: When the
partial load adaptation value (display field 2)
is normal
Fuel pressure too low
Check O2S heating
Fuel injector not opening or only partly
opening
O2S adaptation not active
Malfunction elimination
- Oil change or a fast drive on
country roads
- Check fuel pressure regulator
Page 24-120
- Check fuel injectors
115
- Check O2S heating
35
- Check intake air system for
leaks (unmetered air)
24-123
- Check exhaust system:
Repair Manual, 2.8 Liter VR6
2V Engine Mechanical, Engine
Code(s): AAA, Repair Group 26
- Check fuel pressure regulator
Page 24-120
- Check O2S heating
35
- Check fuel injectors
115
- Check whether O2S adaptation
is active Page 24-31
control status
If O2S control adaption is not
active:
- Check Mass Air Flow (MAF)
sensor Page 24-62
Page 30 of 126
24-29
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, O2S
12/6/2004