instrument cluster AUDI A6 1995 C5 / 2.G ATQ Engine Check DTC Memory And Erase DTC Memory Workshop Manual

01-18
Diagnostic Trouble Code (DTC) table

Notes:

When malfunctions occur in monitored sensors or components, Diagnostic Trouble Codes (DTCs) are stored in DTC
memory with a description of the malfunction type.
"E-Gas"-relevant malfunctions are also indicated in the instrument cluster by the warning lamp for Electronic Power
Control ("EPC warning lamp"); Notes for E-gas system Page 24
-134
.
Malfunctions that worsen emissions are also indicated by an exhaust warning lamp (MIL for output DTM) that is also
located in the instrument cluster. There are malfunctions that cause the exhaust warning lamp to light up immediately after
recognition. Malfunctions can also occur that do not cause the exhaust MIL to light up immediately, but only if malfunction
is recognized again after repeated engine starts.
The DTC table is organized by the 5 digit code at left.
If a stored DTC does not recur within the next 40 warm-up cycles, the DTC will be erased automatically.
Malfunctions that occur only sporadically (temporary malfunctions) are are identified by the letters "SP" (sporadic
malfunction) on the VAG1551 scan tool display. The word sporadic means "appearing or occurring at irregular intervals,
occasional".
Do not immediately replace components that the VAG1551/VAS5051 suggests are faulty, instead: Check wire
connections and harness connectors to these components according to wiring diagram. Also check Ground (GND)
connections according to wiring diagram. This is particularly valid when malfunctions are displayed as "sporadically
occurring" (SP).
Pa
ge 6 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-36

DTC
DTC text
Corrective action
SAE
VAG


P1149 17557 Oxygen sensor control, bank 1
Unplausible control value - Check oxygen sensor adaptation values and
regulation Page 24
-83

- Check fuel system pressure Page 24
-30
P1150 17558 Oxygen sensor control, bank 2
Unplausible control value - Check intake system for proper seal Page 24
-
64

P1171 17579 Angle sensor -2- for throttle drive (power accelerator
actuation) -G188-
Implausible signal
2)3)
- Check angle sensor -1- for throttle drive Page
24
-148

P1172 17580 Angle sensor -2- for throttle drive (power accelerator
actuation) -G188-
Signal too small
2) 3)

P1173 17581 Angle sensor -2- for throttle drive (power accelerator
actuation) -G188-
Signal too large
2) 3)


2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, ECM switches on the exhaust warning lamp in instrument cluster immediately after recognizing the
malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 27 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-40

DTC
DTC text
Corrective action
SAE
VAG


P1250 17658
Fuel level too low
4)
Repair Manual, Electrical Equipment, Repair Group 01, On Board Diagnostic
(OBD) of instrument cluster; Read Measuring Value Block
- Fill fuel tank with fuel
- Check wire connection between Engine Control Module (ECM) and instrument
cluster according to wiring diagram
- Check signal from sender for fuel gauge and fuel gauge
P1296 17704 Malfunction in cooling
system
1)
Repair Manual, Engine Mechanical, Repair Group 19; Cooling system
components, removing and installing - Check coolant temperature sensor Page 28
-23
- Check coolant regulator
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
4) The DTC "Fuel Level Too Low" is stored when there is/was too little fuel in fuel tank. The DTC is stored as a static
malfunction and is not switched to sporadic even if fuel tank has been filled with fuel (e.g. by the customer) in the meantime.
In this way, it can be determined that subsequent malfunctions were caused by lack of fuel, e.g. combustion misfires or
oxygen control related malfunctions.
Pa
ge 31 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the
instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 34 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-43

DTC
DTC text
Corrective action
SAE
VAG


P1386 17794 Control module faulty
- replacing Engine Control Module (ECM) Page 24
-21
P1387 17795
Control module faulty
1)

P1388 17796
Control module faulty2) 3)


P1391 17799 Bank 2, Camshaft Position (CMP) sensor -G40

Short circuit to Ground (GND)
1) - Check Camshaft Position (CMP) sensor Page 28
-45
P1392 17800 Bank 2, Camshaft Position (CMP) sensor -G40

Open circuit / short circuit to B+
1)
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the
instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 35 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

P1544 17952 Throttle Actuation
Potentiometer -G187-
Signal too large
2) 3)

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, the ECM switches on the Malfunction Indicator Lamp (MIL) in the instrument cluster immediately
after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 45 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-50

DTC
DTC text
Corrective action
SAE
VAG


P1545 17953 Throttle valve control
Malfunction
2) 3)
- Check throttle valve control module Page 24
-141
P1558 17966 Throttle drive (power accelerator actuation) -G186-
Electrical malfunction in circuit
2) 3)

P1559 17967 Throttle valve control module -J338-
Malfunction in basic setting
1) 2)
- Perform adaptation Page 24
-142
P1564 17972 Throttle valve control module -J338-
Voltage too low during basic setting - Charge battery, repeat basic setting
P1565 17973 Throttle valve control module -J338-
Lower impact still not reached
2) 3)
- Check throttle valve control module Page 24
-141
P1568 17976 Throttle valve control module -J338-
Mechanical malfunction
2) 3)

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the
instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 46 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-52

DTC
DTC text
Corrective action
SAE
VAG


P1603 18011
Control module faulty
1)
- Replace Engine Control Module (ECM) Page 24
-21
P1604 18012
Control module faulty
2) 3)


P1606 18014 Rough terrain info/engine torque
from ABS control module
Electrical malfunction in circuit
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder - Check wire connection between Engine Control Module (ECM) and
ABS control module (powertrain databus) Page 24
-192

P1609 18017 Crash shut-off was triggered
(Crash triggered)
5) Repair Manual, Body
-On Board Diagnostic (OBD), Repair Group 01;
On Board Diagnostic (OBD) of airbag system

- Erase DTC memory of the Engine Control Module (ECM) after output
Diagnostic Test Mode (DTM) of the airbag system Page 01
-15

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the
instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
5) DTC is stored upon appropriate signal from airbag control module, also during output Diagnostic Test Mode (DTM) of the
airbag system.
Pa
ge 48 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-54

DTC
DTC text
Corrective action
SAE
VAG


P1630 18038 Throttle Position (TP) sensor -G79-
Signal too small
2) 3)
- Throttle Position (TP) sensor, checking
Page 24
-154

P1631 18039 Throttle Position (TP) sensor -G79-
Signal too large
2) 3)

P1633 18041 Sender -2- for accelerator pedal position -G185-
Signal too small
2) 3)


P1634 18042 Sender -2- for accelerator pedal position -G185-
Signal too large
2) 3)


P1639 18047 Throttle Position (TP) sensor -G79- and sender -2- for
accelerator pedal position -G185-
Implausible signal
2)3)
- Throttle Position (TP) sensor, checking
Page 24
-154

P1640 18048
Control module faulty
1)
- replacing Engine Control Module (ECM)
Page 24
-21

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
Pa
ge 50 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the
instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 51 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2