Audi A2 from Sweden

Hi Danne
I also live in Stockholm. I have problems with my engine. It jerks at low throttle at contact speed. Sometimes the dash board lights up like a christmas tree an beeps load. This always happens when it jerks heavily. There are no error codes on the engine. On the ABS part it says something about the ECU. I have gone through a lot and replaced about all sensors that can be replaced including cleaned Throttle body and new EGR. I am starting to think the ECU is faulty. How can you check the ECU? Can you uppdate the ECU software?
 
BJohan said:
Hi Danne
I also live in Stockholm. I have problems with my engine. It jerks at low throttle at contact speed. Sometimes the dash board lights up like a christmas tree an beeps load. This always happens when it jerks heavily. There are no error codes on the engine. On the ABS part it says something about the ECU. I have gone through a lot and replaced about all sensors that can be replaced including cleaned Throttle body and new EGR. I am starting to think the ECU is faulty. How can you check the ECU? Can you uppdate the ECU software?
Click to expand...
Hi @BJohan
Which engine does your A2 have?
Mac.
 
I have seen from the dealership diagnostics that early AUA have faulty ECUs that was recommended to replace.
 
Olerype said:
I have seen from the dealership diagnostics that early AUA have faulty ECUs that was recommended to replace.
Click to expand...

Maybe but what you are describing sounds a lot like a lot of people’s experiences. At low throttle low revs in a low gear they can be a bit kangarooy


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Here is the autiscan from vcds.
VCDS-Lite Version: Release 1.2

Friday, 10 July 2020, 15:27:24:44988





Chassis Type: 8Z - Audi A2

Scan: 01,02,03,08,15,16,17,18,37,45,46,56,57,75,76,77



-------------------------------------------------------------------------------

Address 01: Engine Labels: 036-906-034-APE.LBL

Controller: 036 906 034 Q

Component: MARELLI 4LV 3689

Coding: 00051

Shop #: WSC 02138

VCID: 2033CC3FB3DB

WAUZZZ8ZZ1N019022 AUZ7Z0Y1582188

No fault code found.

Readiness: 0000 0000



-------------------------------------------------------------------------------

Address 03: ABS Brakes Labels: None

Controller: 8Z0 907 379 B

Component: ESP 20 CAN V015

Coding: 10758

Shop #: WSC 00000

VCID: 47E177A376B5

1 Fault Found:

01314 - Engine Control Module

79-10 - Please Check Fault Codes - Intermittent



-------------------------------------------------------------------------------

Address 08: Auto HVAC Labels: None

Controller: 8Z0 820 043 A

Component: A2-KLIMAVOLL

VCID: 341B306F1723

Note: Excessive Comm Errors



-------------------------------------------------------------------------------

Address 15: Airbags Labels: 8Z0-959-655.LBL

Controller: 8Z0 959 655 E

Component: Airbag Front+Seite 4005

Coding: 01102

Shop #: WSC 02138

VCID: 4EEF428799CF

No fault code found.



-------------------------------------------------------------------------------

Address 17: Instruments Labels: 8Z0-920-xxx-17.LBL

Controller: 8Z0 920 900 A

Component: W1-KOMBIINSTR. VDO D13

Coding: 05142

Shop #: WSC 05314

VCID: 370107630655

WAUZZZ8ZZ1N019022 AUZ7Z0Y1582188

No fault code found.



-------------------------------------------------------------------------------

Address 46: Central Conv. Labels: None

Controller: 8Z0 959 433 N

Component: Komfortgerát T2D 0614

Coding: 06730

Shop #: WSC 40584

VCID: 51D559FB88F1

5 Faults Found:

01330 - Central Control Module for Central Convenience (J393)

37-00 - Faulty

01616 - Signal Wire to Interior Monitor

49-00 - No Communications

01403 - Glass-Break Sensors; Rear

36-00 - Open Circuit

01559 - Drivers Door

60-00 - Won't Safe

01331 - Door Control Module; Driver Side (J386)

49-10 - No Communications - Intermittent



End --------------------------------------------------------------------------------------------------
 
Edwrai said:
Maybe but what you are describing sounds a lot like a lot of people’s experiences. At low throttle low revs in a low gear they can be a bit kangarooy


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Click to expand...

I don't think this jerkyness is normal. It can happen in 30-40 mph on third gear at low throttle. Also this alarming beep and flashing display says something not normal is happening.
IMG_9129.PNG
 
BJohan said:
I don't think this jerkyness is normal. It can happen in 30-40 mph on third gear at low throttle. Also this alarming beep and flashing display says something not normal is happening.
View attachment 67307
Click to expand...

No that’s not normal, does it ever shut down and stop all together after this?


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When this happens it does not respond to throttle at all. It goes into limp mode. After you stop and restart the engine you can drive away like nothing has happened.
 
BJohan said:
When this happens it does not respond to throttle at all. It goes into limp mode. After you stop and restart the engine you can drive away like nothing has happened.
Click to expand...

Ok that’s an EPC issue, could be the wiring from the throttle pedal or the throttle body. Or the throttle body itself. Or the throttle pedal. Could also maybe be the ecu. I’ve had a throttle body fault on a 1.4 bby and it used to come up like a Christmas tree then shutdown the car.


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I have replaced the throttle body with a used one and it made no difference. I have also replaced the throttle pedal with a used one, No difference,
 
About the VCDS scan, did you first clear all error codes, and then took it for a drive and then scanned again, and that is what you showed? Or what were the circumstances?
 
Joga said:
About the VCDS scan, did you first clear all error codes, and then took it for a drive and then scanned again, and that is what you showed? Or what were the circumstances?
Click to expand...
My daughter had the car for a few days and this beep and flashing display happened many times. When she came back I took the scan. I did not clear any codes before I took the scan.
 
BJohan said:
My daughter had the car for a few days and this beep and flashing display happened many times. When she came back I took the scan. I did not clear any codes before I took the scan.
Click to expand...
Might be helpful to :
clear error codes-drive until limp home or christmas tree - scan, to get a feeling for whats going on?
 
After half an hour driving in different conditions I managed to provoke the beep and Christmas tree. It happened on first gear at very slow speed. No limp mode this time. I could just drive on with all lights on the dash board ligting. I made a vcds scan without turning the engine off.

17961 - Barometric / Manifold Pressure Signals: Implausible Correlation

P1553 - 35-10 - - - Intermittent

It doesn't say anything to me. When the engine is jerking I could imagine the pressure signal from the manifold is pretty chaotic.
 
BJohan said:
After half an hour driving in different conditions I managed to provoke the beep and Christmas tree. It happened on first gear at very slow speed. No limp mode this time. I could just drive on with all lights on the dash board ligting. I made a vcds scan without turning the engine off.

17961 - Barometric / Manifold Pressure Signals: Implausible Correlation

P1553 - 35-10 - - - Intermittent

It doesn't say anything to me. When the engine is jerking I could imagine the pressure signal from the manifold is pretty chaotic.
Click to expand...

Have a read of this. Seems timing related


Error code P1553

I Have just got an error code on my wifes polo 1.4 16v 17961 Barometric/Manifold pressure signals: Implausible Correlation P1553-35-10 ----Intermittent Help Please !!!
www.vwaudiforum.co.uk


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Sad to say I have already done everything they mention. I have replaced the cambelt and it was actually out of timing. I have also cleaned the throttle body and adapted it with vcds. I also tried with another throttle body and it made no difference. I have replaced the MAP sensor. I have replaced the coil.
 
BJohan said:
Sad to say I have already done everything they mention. I have replaced the cambelt and it was actually out of timing. I have also cleaned the throttle body and adapted it with vcds. I also tried with another throttle body and it made no difference. I have replaced the MAP sensor. I have replaced the coil.
Click to expand...

Ok is your cam sensor after market by any chance?


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