light AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst

01-70

DTC
Description of malfunction
Corrective action
SAE
VAG


P1624 18032 MIL Request Sign. active Exhaust relevant malfunction from Transmission Control Module (TCM),
MIL is switched on by TCM
Repair Manual, Automatic Transmission, Repair Group 01, Perform
On Board Diagnostic - Check DTC Memory of TCM
P1626 18034
Data-Bus Powertrain
2)
Missing message from fuel
injection pump - Check CAN-Bus Page 24
-201
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Note for malfunction P1624:

MIL stands for Malfunction Indicator Light. Once the Engine Control Module (ECM) recognizes a malfunction that
decreases the exhaust emissions it switches the MIL on.
The MIL is switched on only by the Engine Control Module (ECM), since the ECM has the only connection to the MIL..
Malfunction that decrease the exhaust emissions can also be recognized by the Transmission Control Module (TCM),
These malfunction are also indicated by the MIL.
Pa
ge 84 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-71

DTC
Description of malfunction
Corrective action
SAE
VAG


P1630 18038 Accelera. Pedal Pos. Sensor 1
Signal too Low
1) 3)
- Check acceleration pedal position sensor Page 24
-159
P1631 18039 Accelera. Pedal Pos. Sensor 1
Signal too High
1) 3)

P1633 18041 Accelera. Pedal Pos. Sensor 2
Signal too Low
1) 3)

P1634 18042 Accelera. Pedal Pos. Sensor 2
Signal too High
1) 3)


1) With this malfunction the EPC (Electronic Power Control) Malfunction Indicator Light (MIL) in the instrument cluster is
switched on by the ECM. Significance of EPC malfunction indicator light Page 24
-142
.
3) With this malfunction the exhaust Malfunction Indicator Light (MIL) is switched on by the ECM, immediately after the
malfunction has been recognized. Significance of MIL Page 01
-3 .
Pa
ge 86 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-72

DTC
Description of malfunction
Corrective action
SAE
VAG


P1639 18047 Accelera. Pedal Pos.
Sensor1+2
Range/Performance
1) 3)
- Check acceleration pedal position sensor Page 24
-159
P1640 18048 Internal Control Module
(EEPROM)
Error
2) - Replace Engine Control Module (ECM) Page 24
-24
.
P1648 18056 Data Bus Powertrain
Malfunction - Check data exchange between Engine-/ABS-/Transmission control
module Page 24
-201

P1649 18057 Data Bus Powertrain
Missing message from ABS
Control Module Repair Manual, Brake System On Board Diagnostic (OBD), Repair
Group 01, checking DTC memory of ABS control module
- Check DTC memory of ABS control module
- Check data exchange between Engine-/ABS-/Transmission control
module Page 24
-201

1) With this malfunction the EPC (Electronic Power Control) Malfunction Indicator Light (MIL) in the instrument cluster is
switched on by the ECM. Significance of EPC malfunction indicator light Page 24
-142
.
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 87 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

3) With this malfunction the exhaust Malfunction Indicator Light (MIL) is switched on by the ECM, immediately after the
malfunction has been recognized. Significance of MIL Page 01
-3 .
Pa
ge 88 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-73

DTC
Description of malfunction
Corrective action
SAE
VAG


P1650 18058 Powertrain CAN-bus
Missing message from instrument
cluster - Check data transfer Page 24-201
P1654 18062 Check DTC memory of the instrument
cluster - Check DTC memory of instrument cluster and repair
malfunctions
P1676 18084 Drive by Wire-MIL Circ.
Electrical Malfunction
1) - Significance of Electronic Power Control (EPC) warning light
Page 24
-142

P1677 18085 Drive by Wire-MIL Circ.
Short to B+
1)

P1690 18098 Malfunction Indication Light
Malfunction 2) - Check wiring for exhaust Malfunction Indicator Light (MIL)
Page 01
-4
P1693 18101 Malfunction Indication Light
Short circuit to B+
2)
1) With this malfunction the EPC (Electronic Power Control) Malfunction Indicator Light (MIL) in the instrument cluster is
switched on by the ECM. Significance of EPC malfunction indicator light Page 24
-142
.
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 89 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

Note:
The malfunction light for power acceleration -K132- is also called the EPC warning lamp.
Pa
ge 90 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-74

DTC
Description of malfunction
Corrective action
SAE
VAG


P1851 18259 Data Bus Powertrain
Missing Message from Brake Contr
Repair Manual, Brake System On Board Diagnostic (OBD), Repair
Group 01, checking DTC memory of ABS control module
- Check DTC memory of ABS control module
- Check data exchange between Engine-/ABS-
/Transmission control
module Page 24
-201

P1853 18261 Data Bus Powertrain
Unplausible Message from Brake
Contr.
P1854 18262 Data Bus Powertrain
Hardware Defective
P3262 19718 Exhaust bank 1/2 oxygen sensors
behind catalytic converter
mixed up - Check harness connectors for oxygen sensors and check installed
position of oxygen sensors behind catalytic converter. 1) With this malfunction the EPC (Electronic Power Control) Malfunction Indicator Light (MIL) in the instrument cluster is
switched on by the ECM. Significance of EPC malfunction indicator light Page 24
-142
.
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 91 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

1
2
3
4
Note:
If test is not initiated or the display jumps from "Test ON" to "Test OFF"
slightly accelerate engine briefly, test will be repeated. - Check specified value in display field 4:
Pa
ge 134 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1