coolant AUDI A4 2000 B5 / 1.G AHA Engine On Board Diagnostic Workshop Manual

01-19

Diagnostic Trouble Code
(DTC)
Malfunction text
MIL
Corrective action
SAE
VAG



P0102 16486 Mass or Volume Air Flow
Circ.
Low Input 2
Dcy - Check Mass Air Flow (MAF) sensor -G70- page 24
-68

P0103 16487 Mass or Volume Air Flow
Circ.
High Input
P0112 16496 Intake Air Temp. Circ.
Low Input 2
Dcy - Check Intake Air Temperature (IAT) sensor -G42-
page 24
-82

P0113 16497 Intake Air Temp. Circ.
High Input
P0116 16500 Engine Coolant Temp. Circ.
Range/Performance 2
Dcy - Check Engine Coolant Temperature (ECT) sensor -
G62- page 24
-75

P0117 16501 Engine Coolant Temp. Circ.
Low Input
P0118 16502 Engine Coolant Temp. Circ.
High Input
P0121 16505 Throttle/Pedal Pos. Sensor A 2
Pa
ge 26 of 97 On Board Dia
gnostic
(OBD
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.01.1

01-59

Notes:
After selecting "Basic Setting" function 04, the
ECM takes the following actions:

EVAP canister purge regulator valve is
closed
A/C compressor is switched of
f

Requirements

Vehicle stationary, engine running at idle
Accelerator pedal not depressed
Selector lever in "P" or "N" position
No malfunctions stored in DTC memory
Engine coolant temperature at least 80 C
(176 F)

All electrical consumers switched off (coolant
fan must not run during test)

A/C switched off (press "-" button on A/C
Pa
ge 80 of 97 On Board Dia
gnostic
(OBD
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.01.1

Engine coolant temperature (necessary for "Basic Setting")
170-204
80-105 C
Pa
ge 86 of 97 On Board Dia
gnostic
(OBD
)
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yp
e=re
pair&id=AUDI.B5.FU03.01.1

01-63
Display group 000-evaluation Display field
1
Possible malfunction cause
Corrective action
greater than
204
Engine coolant temperature (ECT) sensor -
G62- - Check ECT sensor page 24
-75
less than 170

Engine coolant temperature (ECT) sensor -
G62- - Check ECT sensor page 24
-75


Coolant thermostat faulty (open)
Repair Manual, 2.8 Liter V6 5V Engine Mechanical,
Repair Group 19 - Check thermostat
Display field
2
Possible malfunction cause
Corrective action
greater than
50
Electrical consumers switched on- Switch off electrical consumers

Oxygen Sensor (O2S) control at limit- Check HO2S and O2S control before TWC page 24
-
22

- Check HO2S aging, bank 1, sensor 1 (before TWC)
page 24
-60

- Check HO2S aging, bank 2, sensor 1 (before TWC)
page 24
-63

less than 20

Intake air leaks ("false air")- Check intake air system for leaks page 24
-126Pa
ge 87 of 97 On Board Dia
gnostic
(OBD
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.01.1