1997 AUDI A4 check engine

01-34

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



P1139 17547 Long Term Fuel Trim Add.
Fuel, Bank2
System too Rich 2) 2 Dcy
- Check Heated Oxygen Sensor (HO2S) 2 -G108- (bank
2, sensor 1) and O2S control page 24
-22

- Check fuel pressure, fuel pressure regulator and
residual pressure page 24
-111

- Check exhaust system for leakage Repair Manual,
2.8 Liter V6 5V Engine Mechanical, Repair Group 26
P1141 17549 Load Calculation Cross
Check
Range/Performance 2 Dcy
- Check Mass Air Flow (MAF) sensor -G70- page 24
-
68

- Check throttle valve control module page 24
-128
P1171 17579 Throttle Actuation
Potentiometer Signal 2
Range/Performance 1) Immed.
- Check throttle actuation potentiometer page 24
-
136
.
1) 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
-2 .
2) The term "Add." = additive; applies only with engine running at idle speed.
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01-45

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



P1543 17951 Throttle Actuation Potentiometer
Signal too Low 2
Dcy - Check throttle drive and angle sensor
for throttle drive page 24
-136

P1544 17952 Throttle Actuation Potentiometer
Signal too High
P1545 17953 Throttle Pos. Contr.
Malfunction
P1558 17966 Throttle Actuator
Electrical Malfunction

P1559 17967 Idle Speed Contr. Throttle Pos.
Adaptation Malfunction
(Adaptation of throttle valve control module to engine
control module interrupted by application of
accelerator pedal or by starting engine.) Off
- Check adaptation of throttle valve
control module to Engine Control
Module (ECM) page 24
-150

P1560 17968 Maximum Engine Speed Exceeded Off
- Carry out engine mechanical repairs
as necessary
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01-46

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



P1564 17972 Idle Speed Contr. Throttle Pos.
Low Voltage During Adaptation
(Supply voltage under 10 V during adaptation of throttle
valve control module to engine control module.) Off
- Check voltage supply to ECM
page 24
-90

P1565 17973 Idle Speed Contr. Throttle Pos.
Lower Impact Not Attained
(Lower specification not attained during adaptation of
throttle valve control module to engine control module,
e.g., accelerator pedal cable incorrectly adjusted,
throttle body dirty, etc.) 2 Dcy
- Clean throttle body
- Check accelerator pedal cable
adjustment Repair Manual,
Fuel Supply System, Repair
Group 20 P1600 18008 Power Supply (B+) Terminal 15
Low Voltage Immed.
- Check voltage supply to Engine
Control Module (ECM) page
24
-90

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01-47

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



P1602 18010 Power Supply (B+) Terminal 30
Low Voltage Off
- Check voltage supply to ECM page 24
-
90

P1606 18014 Rough Road Spec Engine Torque ABS-
ECU
Electrical Malfunction Off
- Check ABS control module signal for
rough road recognition page 24
-174

P1612 18020 Electronic Control Module
Incorrect Coding
(Vehicle with automatic transmission is
coded for manual transmission.) Immed.
- Code ECM page 01
-12
Electronic Control Module
Incorrect Coding
(Vehicle with ASR is not coded for ASR) Off
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01-49

Erase DTC Memory (scan tool function
05)


Required special tools and test equipment
VAG1551 Scan Tool (ST) with VAG1551/3
adapter cable

Test condition
Malfunction(s) repaired

Note:
If DTC memory has been erased, generate new
readiness code page 01
-73
.

Erasing

- Connect VAG1551/VAG1552 Scan Tool (ST)
and press buttons -0- and -1- to insert "Engine
Electronics" address word 01 (engine running at
idle) page 01
-8 .
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select "Check DTC Memory" function 02,
and press -Q- button to confirm input.
-
Press button to advance through program sequence until all stored
malfunctions have been displayed.
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01-51

Output Diagnostic Test Mode (DTM)
(scan tool function 03)


Notes:

The output Diagnostic Test Mode (DTM) can be
activated only with ignition switched on and the
engine not running.
The output DTM is interrupted if the engine is
started, or if a rotary pulse from the ignition
system is recognized.
When operating in the output DTM, the
individual output signals are actuated until the
program sequence is advanced by pressing the
button.

Output signals are checked by listening for the
sound of the component being actuated, or
feeling for mechanical evidence of actuation,
such as clicking, vibration, etc.
Without letting the engine run, briefly switch the
ignition off for approx. 20 seconds before
repeating the output checks.
During the entire output DTM sequence, the
electric fuel pump will run.
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01-53

Test sequence

- Connect VAG1551/VAG1552 scan tool and
insert "Engine Electronics" address word 01
(ignition on) page 01
-8 .
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -3- to select "Output Diagnostic Test Mode"
function 03.
Rapid data transfer
Q
03 - Output Dia
gnostic Test Mode

Indicated on display
Fuel injectors:
- Press -Q- button to confirm input.
Output Diagnostic Test Mode Cylinder 1 Fuel In
jector-N30

Indicated on display
Note:
The fuel pump relay must be activated, the fuel pump must run, and you
must clearly hear the flow of fuel in the fuel pressure regulator. If the fuel
pump does not run, check fuel pump relay and connections page 24
-
95
.
- Operate throttle valve at throttle body.
As soon as the Closed Throttle Position (CTP) switch opens, cylinder 1
fuel injector must be actuated (click) 5 times.
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01-55

EVAP canister purge regulator valve -N80-:

-
Press button.Output Diagnostic Test Mode EVAP Canister Pur
ge Re
gulator Valve-N80

Indicated on display
The valve will click until pressing the button to advance the program
sequence.
If the valve is not actuated (does not click):
Secondary Air Injection (AIR) solenoid valve -N112-: - Check EVAP canister purge regulator valve page 24
-116
.
-
Press button.
Output Diagnostic Test Mode Secondar
y Air In
jection Valve-N112

Indicated on display
The valve will click until pressing the button to advance the program
sequence.
If the valve is not actuated (does not click): - Check secondary air injection solenoid valve -N112- Repair Manual,
2.8 Liter V6 5V Engine Mechanical, Repair Group 26.
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