Avantone
New Member
ok deep breath...
2002 1.4 petrol
This started as a code for a misfire on Cylinder 3
VCDS showed a constant misfire count on cylinder 3
Removed coil (4 in 1, not individual packs) and saw corrosion on "C" (3) HT connection.
Cleaned connection and HT lead thoroughly, refitted and VCDS showed zero misfires.
Spark plug is <6 months old looks good. Plug resistance and lead impedance is within spec.
Test drove but still a slight misfire under load.
Engine then went into limp and sounds like its on 3 cylinders.
Drove home (quarter mile) and parked up.
Hypothesis is that coil has been damaged by previous high resistance connection.
Had a new pattern coil handy so fitted to see if condition changed why I wait for a new Bosch item next week.
Car doesn't start... check connections, HT lead positions etc, still doesn't start.
Change back to original coil... Car still doesn't start.
Run VCDS:
17989 - Throttle Actuator (J338)
P1581 - 35-00 - Basic Setting Not Performed
17953 - Throttle Valve Controller
P1545 - 35-00 - Malfunction
Not sure why the throttle body is suddenly an issue.
Check that I haven't knocked a lead/connector off - no visible issues
I've also got a couple of suspect codes on the ABS referencing the ECM
2 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
Run VCDS to do a throttle body adaption
Adaption gets 2 steps in and then shows ERROR in the 4th box
Battery on charge and showing 12.5v
Battery disconnected and leads shorted to reset ECU
Battery reconnected showing 12.5v
Cleared codes but codes above return immediately and adaption again shows ERROR after 2 steps
Visual check of ECU is fine. Clean/dry and undisturbed since new
Throttle body was cleaned a couple of months ago and new OEM gaskets used for body and EGR
Checked TB plug and pins - all clean and seem ok
So currently I've done all I can until a used TB and new coil arrive next week.
Any thoughts on what the issue could be? I'm confident the coil is bad, but why have I suddenly got what seems unrelated TB issues, or am I on the wrong track? Earth points, ECU etc?
Many thanks in advance, Tony
Full VCDS autoscan:
Sunday,19,March,2023,11:02:58:08140
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.0.0 (x64) HEX-V2 CB: 0.4631.4
Data version: 20230228 DS346.1
www.Ross-Tech.com
VIN: WAUZZZ8Z52N012622 License Plate:
Chassis Type: 8Z (8Z - Audi A2 (2000 > 2005))
Scan: 01 02 03 08 15 16 17 18 37 45 46 56 57 75 76 77
VIN: WAUZZZ8Z52N012622
-------------------------------------------------------------------------------
Address 01: Engine Labels: 036-906-034-APE.lbl
Part No: 036 906 034 EG
Component: MARELLI 4MV 4030
Coding: 00051
Shop #: WSC 02138
VCID: 5BE39B027A347C123A1-4B5C
WAUZZZ8Z52N012622 AUZ7Z0A1925514
1 Fault Found:
17989 - Throttle Actuator (J338)
P1581 - 35-00 - Basic Setting Not Performed
Readiness: 1110 0101
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8Z0-907-379-MK60.lbl
Part No: 8Z0 907 379 C
Component: ESP FRONT MK60 0101
Coding: 0019463
Shop #: WSC 02154 785 00200
VCID: 48C9544EDEA2078A873-5184
2 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: None
Part No: 8Z0 820 043 F
Component: A2-KLIMAVOLLAUTOMAT 0510
VCID: 392F218A90486E0208D-2596
10 Faults Found:
00710 - Defroster Flap Positioning Motor (V107)
41-10 - Blocked or No Voltage - Intermittent
01272 - Positioning Motor for Central Flap (V70)
41-10 - Blocked or No Voltage - Intermittent
01271 - Positioning Motor for Temperature Flap (V68)
41-10 - Blocked or No Voltage - Intermittent
00716 - Air recirculation Flap Positioning Motor (V113)
41-10 - Blocked or No Voltage - Intermittent
00727 - Potentiometer in Positioning Motor for Defrost Flap (G135)
30-10 - Open or Short to Plus - Intermittent
00601 - Potentiometer On Positioning Motor for Central Flap (G112)
30-10 - Open or Short to Plus - Intermittent
00600 - Potentiometer On Positioning Motor for Temperature Flap (G92)
30-10 - Open or Short to Plus - Intermittent
00735 - Potentiometer in Positioning Motor for Air recirculation Flap (G143)
30-10 - Open or Short to Plus - Intermittent
00818 - Sensor for Evaporator Outlet Temperature (G263)
30-00 - Open or Short to Plus
01206 - Signal for Duration of Ignition Off Time
27-00 - Implausible Signal
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8Z0-959-655.lbl
Part No: 8Z0 959 655 E
Component: Airbag Front+Seite 5005
Coding: 01102
Shop #: WSC 02152
VCID: 4EC5625639C6D9BACDF-5160
1 Fault Found:
01578 - Airbag Deactivation Warning Lamp; Passenger Side (K145)
31-10 - Open or Short to Ground - Intermittent
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8Z0-920-xxx-17.lbl
Part No: 8Z0 920 950 J
Component: KOMBI+WEGFAHRS. VDO D05
Coding: 05442
Shop #: WSC 52227
VCID: 45D75D7AECB01AE27C5-5160
WAUZZZ8Z52N012622 AUZ7Z0A1925514
3 Faults Found:
01304 - Radio
49-00 - No Communications
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01760 - Power Steering Control Module (J500) No comm. with Engine Control Module (ECM)
49-10 - No Communications - Intermittent
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: None
Part No: 8Z0 951 171
Component: Innenraumueberw. D04
Coding: 00001
Shop #: WSC 00000
VCID: 7AADFE86D5CEA51A417-5118
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels:. 8Z0-959-433.lbl
Part No: 8Z0 959 433 Q
Component: Komfortgerát T1D 0614
Coding: 06858
Shop #: WSC 02138
VCID: 54F1703E17EAB36AFBB-4B00
Subsystem 1 - Part No: 8Z2959802
Component: Tõrsteuer.FS BRM 0001
Subsystem 2 - Part No: 8Z2959801
Component: Tõrsteuer.BF BRM 0001
7 Faults Found:
01330 - Central Control Module for Central Convenience (J393)
37-00 - Faulty
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01573 - Alarm triggered by Door Contact Switch; Rear Left
35-00 - -
01561 - Rear left door
61-00 - Won't De-Safe
01562 - Rear right door
59-10 - Can't Unlock - Intermittent
01562 - Rear right door
61-10 - Won't De-Safe - Intermittent
End----------(Elapsed Time: 03:48, VBatt start/end: 12.8V/12.8V)-----------
2002 1.4 petrol
This started as a code for a misfire on Cylinder 3
VCDS showed a constant misfire count on cylinder 3
Removed coil (4 in 1, not individual packs) and saw corrosion on "C" (3) HT connection.
Cleaned connection and HT lead thoroughly, refitted and VCDS showed zero misfires.
Spark plug is <6 months old looks good. Plug resistance and lead impedance is within spec.
Test drove but still a slight misfire under load.
Engine then went into limp and sounds like its on 3 cylinders.
Drove home (quarter mile) and parked up.
Hypothesis is that coil has been damaged by previous high resistance connection.
Had a new pattern coil handy so fitted to see if condition changed why I wait for a new Bosch item next week.
Car doesn't start... check connections, HT lead positions etc, still doesn't start.
Change back to original coil... Car still doesn't start.
Run VCDS:
17989 - Throttle Actuator (J338)
P1581 - 35-00 - Basic Setting Not Performed
17953 - Throttle Valve Controller
P1545 - 35-00 - Malfunction
Not sure why the throttle body is suddenly an issue.
Check that I haven't knocked a lead/connector off - no visible issues
I've also got a couple of suspect codes on the ABS referencing the ECM
2 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
Run VCDS to do a throttle body adaption
Adaption gets 2 steps in and then shows ERROR in the 4th box
Battery on charge and showing 12.5v
Battery disconnected and leads shorted to reset ECU
Battery reconnected showing 12.5v
Cleared codes but codes above return immediately and adaption again shows ERROR after 2 steps
Visual check of ECU is fine. Clean/dry and undisturbed since new
Throttle body was cleaned a couple of months ago and new OEM gaskets used for body and EGR
Checked TB plug and pins - all clean and seem ok
So currently I've done all I can until a used TB and new coil arrive next week.
Any thoughts on what the issue could be? I'm confident the coil is bad, but why have I suddenly got what seems unrelated TB issues, or am I on the wrong track? Earth points, ECU etc?
Many thanks in advance, Tony
Full VCDS autoscan:
Sunday,19,March,2023,11:02:58:08140
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.0.0 (x64) HEX-V2 CB: 0.4631.4
Data version: 20230228 DS346.1
www.Ross-Tech.com
VIN: WAUZZZ8Z52N012622 License Plate:
Chassis Type: 8Z (8Z - Audi A2 (2000 > 2005))
Scan: 01 02 03 08 15 16 17 18 37 45 46 56 57 75 76 77
VIN: WAUZZZ8Z52N012622
-------------------------------------------------------------------------------
Address 01: Engine Labels: 036-906-034-APE.lbl
Part No: 036 906 034 EG
Component: MARELLI 4MV 4030
Coding: 00051
Shop #: WSC 02138
VCID: 5BE39B027A347C123A1-4B5C
WAUZZZ8Z52N012622 AUZ7Z0A1925514
1 Fault Found:
17989 - Throttle Actuator (J338)
P1581 - 35-00 - Basic Setting Not Performed
Readiness: 1110 0101
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8Z0-907-379-MK60.lbl
Part No: 8Z0 907 379 C
Component: ESP FRONT MK60 0101
Coding: 0019463
Shop #: WSC 02154 785 00200
VCID: 48C9544EDEA2078A873-5184
2 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: None
Part No: 8Z0 820 043 F
Component: A2-KLIMAVOLLAUTOMAT 0510
VCID: 392F218A90486E0208D-2596
10 Faults Found:
00710 - Defroster Flap Positioning Motor (V107)
41-10 - Blocked or No Voltage - Intermittent
01272 - Positioning Motor for Central Flap (V70)
41-10 - Blocked or No Voltage - Intermittent
01271 - Positioning Motor for Temperature Flap (V68)
41-10 - Blocked or No Voltage - Intermittent
00716 - Air recirculation Flap Positioning Motor (V113)
41-10 - Blocked or No Voltage - Intermittent
00727 - Potentiometer in Positioning Motor for Defrost Flap (G135)
30-10 - Open or Short to Plus - Intermittent
00601 - Potentiometer On Positioning Motor for Central Flap (G112)
30-10 - Open or Short to Plus - Intermittent
00600 - Potentiometer On Positioning Motor for Temperature Flap (G92)
30-10 - Open or Short to Plus - Intermittent
00735 - Potentiometer in Positioning Motor for Air recirculation Flap (G143)
30-10 - Open or Short to Plus - Intermittent
00818 - Sensor for Evaporator Outlet Temperature (G263)
30-00 - Open or Short to Plus
01206 - Signal for Duration of Ignition Off Time
27-00 - Implausible Signal
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8Z0-959-655.lbl
Part No: 8Z0 959 655 E
Component: Airbag Front+Seite 5005
Coding: 01102
Shop #: WSC 02152
VCID: 4EC5625639C6D9BACDF-5160
1 Fault Found:
01578 - Airbag Deactivation Warning Lamp; Passenger Side (K145)
31-10 - Open or Short to Ground - Intermittent
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8Z0-920-xxx-17.lbl
Part No: 8Z0 920 950 J
Component: KOMBI+WEGFAHRS. VDO D05
Coding: 05442
Shop #: WSC 52227
VCID: 45D75D7AECB01AE27C5-5160
WAUZZZ8Z52N012622 AUZ7Z0A1925514
3 Faults Found:
01304 - Radio
49-00 - No Communications
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01760 - Power Steering Control Module (J500) No comm. with Engine Control Module (ECM)
49-10 - No Communications - Intermittent
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: None
Part No: 8Z0 951 171
Component: Innenraumueberw. D04
Coding: 00001
Shop #: WSC 00000
VCID: 7AADFE86D5CEA51A417-5118
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels:. 8Z0-959-433.lbl
Part No: 8Z0 959 433 Q
Component: Komfortgerát T1D 0614
Coding: 06858
Shop #: WSC 02138
VCID: 54F1703E17EAB36AFBB-4B00
Subsystem 1 - Part No: 8Z2959802
Component: Tõrsteuer.FS BRM 0001
Subsystem 2 - Part No: 8Z2959801
Component: Tõrsteuer.BF BRM 0001
7 Faults Found:
01330 - Central Control Module for Central Convenience (J393)
37-00 - Faulty
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01573 - Alarm triggered by Door Contact Switch; Rear Left
35-00 - -
01561 - Rear left door
61-00 - Won't De-Safe
01562 - Rear right door
59-10 - Can't Unlock - Intermittent
01562 - Rear right door
61-10 - Won't De-Safe - Intermittent
End----------(Elapsed Time: 03:48, VBatt start/end: 12.8V/12.8V)-----------