ECO AUDI A4 1998 B5 / 1.G ATW Engine Diagnostic Trouble Code Table Workshop Manual

01-19
Diagnostic Trouble Code (DTC) table Note:

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
-113
.
Malfunctions that worsen emissions are also indicated by an exhaust warning lamp (MIL) 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. Meaning of exhaust MIL Page 01
-3 .
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 1 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

01-23

DTC
DTC text
Corrective action
SAE
VAG


P0300 16684 Combustion misfire detected
- Check fuel pressure Page 24
-33
- Check fuel injectors Page 24
-38
P0301 16685 Cyl. 1 combustion misfire detected
- Check spark plugs and ignition wires with connector
P0302 16686 Cyl. 2 combustion misfire detected
- Ignition coils with power output stages Checking Page 28
-4
P0303 16687 Cyl. 3 combustion misfire detected
- Check misfire recognition Page 28
-51
P0304 16688 Cyl. 4 combustion misfire detected
- Fill fuel tank with fuel
P0321 16705 Engine Speed (RPM) sensor -G28-
Implausible signal - Check sender for fuel gauge Page 28
-26
P0322 16706 Engine Speed (RPM) sensor -G28-
No signal
Pa
ge 9 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

01-25

DTC
DTC text
Corrective action
SAE
VAG


P0411 16795 Secondary air system
Throughput faulty
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine Code(s):
AEB, ATW, Repair Group 26; Checking Secondary Air Injection (AIR) system
- Check combination valve.
- Check hose setup (Secondary Air Injection -AIR- solenoid valve); check intake
system for leaks (false air) Page 24
-68

P0422 16806 Bank 1, main catalytic
converter
Not effective enough
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine 1.8 Liter
4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AEB, ATW, Repair Group
26
- Generate readiness code Page 01
-73
. If the same malfunction is indicated
again, replace catalytic converter.
P0441 16825 Tank ventilation system
Throughput faulty - Check Evaporative Emission (EVAP) canister purge regulator valve Page
24
-107

Pa
ge 11 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

01-27

DTC
DTC text
Corrective action
SAE
VAG


P0501 16885 Vehicle speed signal
Implausible signal - Checking Vehicle Speed Signal (VSS) Page 24
-157
P0506 16890 Idle control RPM below
specified value - Check throttle valve control module Page 24
-120
P0507 16891 Idle control RPM above
specified value - Check hose setup (Secondary Air Injection -AIR- solenoid valve); check
intake system for leaks (false air) Page 24
-68

P0560 16944 Voltage supply
Implausible signal - Check voltage supply for control module Page 28
-36
P0562 16946 Voltage supply
Voltage too low

P0563 16947 Voltage supply
Voltage too high

P0571 16955
Brake light switch -F-
1)

Implausible signal - Check brake light switch and brake pedal switch Page 24
-143
1) Brake pedal switch -F47- is monitored in addition to brake light switch -F-.
Pa
ge 13 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

01-39

DTC
DTC text
Corrective action
SAE
VAG


P1386 17794 Control module faulty
- Replacing Engine Control Module (ECM) Page 24
-23
P1387 17795 Control module faulty
P1388 17796 Control module faulty
P1410 17818 EVAP canister purge
regulator valve -N80-
Short circuit to B+ - Check Evaporative Emission (EVAP) canister purge regulator valve
Page 24
-107

P1421 17829 Secondary Air Injection
(AIR) solenoid valve -N112-
Short circuit to Ground
(GND) Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AEB, ATW, Repair Group 26; Checking Secondary Air Injection (AIR) system

P1422 17830 Secondary Air Injection
(AIR) solenoid valve -N112-
Short circuit to B+
Pa
ge 26 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

01-40

DTC
DTC text
Corrective action
SAE
VAG


P1424 17832 Bank 1, Secondary Air
Injection (AIR) system
Leak detected Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AEB, ATW, Repair Group 26; Checking Secondary Air Injection (AIR) system
- Check hoses and components of the Secondary Air Injection (AIR) system
P1425 17833 EVAP canister purge
regulator valve -N80-
Short circuit to Ground
(GND) - Check Evaporative Emission (EVAP) canister purge regulator valve
Page 24
-107

P1426 17834 EVAP canister purge
regulator valve -N80-
Open circuit
P1432 17840 Secondary Air Injection
(AIR) solenoid valve -N112-
Open circuit Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s):AEB, ATW, Repair Group 26; Checking Secondary Air Injection (AIR) system

P1433 17841 Secondary Air Injection
(AIR) pump relay -J299-
Open circuit
P1434 17842 Secondary Air Injection
(AIR) pump relay -J299-
Pa
ge 27 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

Short circuit to B+
P1435 17843 Secondary Air Injection
(AIR) pump relay -J299-
Short circuit to Ground
(GND)
Pa
ge 28 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

ventilation system
Hose without throughput recognized
Pa
ge 30 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3

01-46

DTC
DTC text
Corrective action
SAE
VAG


P1612 18020 Engine Control Module (ECM)
incorrectly coded
1) - Code Engine Control Module (ECM) Page 01
-62
P1624 18032 Request for warning lamp on
active
1)
Repair Manual, 5 Spd. Automatic Transmission 01V On Board
Diagnostic (OBD), Repair Group 01
- Exhaust related malfunction of Transmission Control Module
(TCM)
- Check DTC memory of Transmission Control Module (TCM)
P1626 18034 Powertrain databus
Missing message from Transmission
Control Module (TCM) - Check data transfer between Engine Control Module (ECM) and
other CAN capable control modules Page 24
-169

1) The Transmission Control Module (TCM) recognized a malfunction that worsens engine emissions. The Transmission
Control Module (TCM) sends the DTC to the Engine Control Module (ECM), which then switches on the Malfunction Indicator
Lamp (MIL) -K83-. Check Malfunction Indicator Lamp (MIL) -K83- Page 01
-3 . The message P1624 is simultaneously
stored in the Engine Control Module (ECM) as evidence that the Malfunction Indicator Lamp (MIL) -K83- was not switched on
due to an engine problem but rather a transmission problem.
Pa
ge 37 of 40 Dia
gnostic Trouble Code
(DTC
) table
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.3