engine AUDI A4 1999 B5 / 1.G AHA Engine On Board Diagnostic User Guide

01-12

Code Control Module (scan tool function
07)

If vehicle coding information is not as specified,
or if the ECM has been replaced, the ECM must
be coded as follows.

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

Coding procedure

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

Indicated on display
- Press buttons -0- and -7- to select "Code Control Module" function 07,
and press -Q- button to confirm input.
Code Control Module
HELP
Input code number XXXXX
(0-32000
)

Indicated on display
- Input applicable code number for vehicle, and press -Q- button to
confirm input. ECM coding variations page 01
-14
.
Function is unknown or

If indicated on display:
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01-16

Check DTC Memory (scan tool function
02)


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

Checking

- 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 .

Note:
If engine does not start:
- Operate starter to crank engine for approx. 6
seconds, then do not switch ignition off.

- Press PRINT button to switch scan tool printer
on (indicator light in button lights up). 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.
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01-18
Diagnostic Trouble Code (DTC) table

Notes:

The DTC table is organized according to SAE and VAG diagnostic trouble codes.
The column labeled "MIL" specifies the MIL switching condition associated with that DTC.
DTCs that do not switch on the MIL after the malfunction is recognized by the ECM are identified by the MIL switching
condition "Off."
DTCs that do switch on the MIL immediately after the malfunction is recognized by the ECM are identified by the MIL
switching condition "Immed."
DTCs that are recognized by the ECM and switch on the MIL after two consecutive driving cycles (Dcy) are identified by
the MIL switching condition "2 Dcy."
Always correct malfunctions that are designated "immediately" as soon as possible, followed by those malfunctions that
are designated "2 Dcy."
When all repairs have been completed, erase DTC memory ( page 01
-49
) and then generate new readiness code
page 01
-73
.
DTCs that are recognized as a result of intermittent malfunctions, or DTCs that are not erased after repairs, are classified
as sporadic malfunctions. These are identified by the designation "SP" appearing in the display.
A sporadic malfunction will be erased if it no longer occurs after 50 driving cycles during which the engine reaching
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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
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01-22

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



P0300 16684 Random/Multiple
Cylinder
Misfire Detected 2 Dcy /
blink - Fuel level too low, check fuel level and add if
necessary
- Check misfire detection page 28
-16
- Check fuel injectors page 24
-102
- Carry out output Diagnostic Test Mode (DTM)
page 01
-51

- Check engine speed (RPM) sensor -G28- page 24
-88

P0301 16685 Cyl. 1
Misfire Detected
P0302 16686 Cyl. 2
Misfire Detected
P0303 16687 Cyl. 3
Misfire Detected
P0304 16688 Cyl. 4
Misfire Detected
P0305 16689 Cyl. 5

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01-23

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



P0321 16705 Ign./Distributor Eng. Speed Inp. Circ.
Range/Performance 2 Dcy
- Check engine speed (RPM) sensor -
G28- page 24
-88

P0322 16706 Ign./Distributor Eng. Speed Inp. Circ.
No Signal Immed.
Note on misfire malfunctions:
For malfunctions that may be caused by low fuel volume (i.e. combustion misfire) a low-fuel malfunction (DTC "P1250") is also
stored when there is less than 2 gallons of fuel remaining in the tank.
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01-24

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



P0327 16711 Knock Sensor1
Circ.
Low Input Immed.
- Check knock sensors and knock sensor control page 28
-8
P0328 16712 Knock Sensor1
Circ.
High Input
P0332 16716 Knock Sensor2
Circ.
Low Input
P0333 16717 Knock Sensor2
Circ.
High Input
P0411 16795 Sec. Air Inj. Sys.
Incorrect Flow
Detected 2 Dcy
- Check Secondary Air Injection (AIR) system Repair Manual,
2.8 Liter V6 5V Engine Mechanical, Repair Group 26 P0422 16806 Main Catalyst,
Bank1
Efficiency Below
Threshold 2 Dcy
- Check Heated Oxygen Sensor (HO2S) -G39- and O2S control
(bank 1, sensor1) page 24
-22

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01-27

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



P1110 17518 O2 Sensor Heating Circ.,
Bank2-Sensor2
Short to B+ 2
Dcy - Check O2S heater -Z30- (bank 2, sensor 2, behind TWC)
page 24
-52

P1127 17535 Long Term Fuel Trim
mult., Bank1
System too Rich 1) 2
Dcy - Check Mass Air Flow (MAF) sensor -G70- page 24
-68
- Check Heated Oxygen Sensor (HO2S) -G39- (bank 1, sensor
1) and O2S control page 24
-22

- Check Oxygen Sensor (O2S) behind Three Way Catalytic
Converter (TWC) -G130- (bank 1, sensor 2) and O2S control
page 24
-42

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

- Check fuel injectors page 24
-102
and Output Diagnostic
Test Mode (DTM) page 01
-51

1) The term "mult." = multiplicative; applies to entire engine speed (RPM) and load range.
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01-28

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



P1128 17536 Long Term Fuel Trim
mult., Bank1
System too Lean 1) 2
Dcy - Check Heated Oxygen Sensor (HO2S) -G39- (bank 1, sensor 1)
and O2S control page 24
-22

- Check Oxygen Sensor (O2S) behind Three Way Catalytic
Converter (TWC) -G130- (bank 1, sensor 2) and O2S control
page 24
-42

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

- Check fuel injectors page 24
-102
and Output Diagnostic
Test Mode (DTM) page 01
-51

- Check EVAP canister purge regulator valve output Diagnostic
Test Mode (DTM), page 01
-51

1) The term "mult." = multiplicative; applies to entire engine speed (RPM) and load range.
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01-29

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



P1129 17537 Long Term Fuel Trim
mult., Bank2
System too Rich 1) 2
Dcy - Check Mass Air Flow (MAF) sensor -G70- page 24
-68
- Check Heated Oxygen Sensor (HO2S) 2 -G108- (bank 2, sensor
1) and O2S control page 24
-22

- Check Oxygen Sensor (O2S) 2 behind Three Way Catalytic
Converter (TWC) -G131- (bank 2, sensor 2) and O2S control
page 24
-42

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

- Check fuel injectors page 24
-102
and Output Diagnostic
Test Mode (DTM) page 01
-51

1) The term "mult." = multiplicative; applies to entire engine speed (RPM) and load range.
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