POLO 9N Catalytic Converter System - Insufficient Effectiveness

Hi!

I'm having another big problem with a POLO 1.2L AZQ, 3-cylinder gasoline engine.

The catalytic converter system's effect is too low. This error occurs approximately every 100 kilometers, and then the engine malfunction light remains on continuously.

Can the catalytic converter efficiency be read out using a VCDS diagnostic tool? And what lambda values should be considered?

Best regards.

Chris.

Possible causes of this error:
- Leak in the intake manifold or exhaust system.
- KAT faulty.
- Faulty oxygen sensor or its wiring.

Sure, here's the translation:

"Could you please post a VCDS Autoscan?" It would also be interesting to see the adaptation values of the Lambda tuning, as indicated in the label file.

Best regards, Rainer.

Hello Rainer!

Here's the Autoscan. Can you tell me which MWB I should post?
Sure, here's the translation:

"Thank you."
Best regards, Chris.

Vehicle type: 9N - VW Polo.
Scan: 01 02 03 08 09 15 17 19 37 44 45 46 56 76

Vehicle Identification Number: WVWZZZ9NZ2D015XXX
Mileage: 107,340 km
-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 01: Engine Label file: RKS\03E-906-033-AZQ.lbl
Part number: 03E 906 033.
Component: 1.2L/4V SIMOS3 00HS4340
Encoding: 00071
Operating number: WSC 31414
VCID: DDB5498D7D43
WVWZZZ9NZ2D01XXXX VWZ7Z0A4516555

No errors found.
Readiness: 0000 0101

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 03: Brakes. Label file: RKS\6Q0-907-37x-ABS2.lbl.
Part number: 6Q0 907 379 E
Part: ABS FRONT MK60 0103
Encoding: 0001097
Operating number: WSC 31414 000 00000
VCID: 3F891305170F

No errors found.

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 08: Climate Control/Heating
Label file: RKS\6Q0-820-045.lbl
Part number: 6Q0 820 045.
Component: Air conditioner X0840.
VCID: EADF1251BC0D

2 errors found:
00819 - High-pressure sensor (G65)
07-00 - Signal too low.
01317 - Control unit in the instrument panel carrier (J285)
79-00 - Please read the error memory.

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 09: Body Control Module. Label file: RKS\6Qx-937-049-B.lbl.
Part number: 6Q1 937 049 B
Component: ON-BOARD NETWORK - SG. 1S31
Encoding: 17566
Operating number: WSC 31414
VCID: 3A7F62110C2D

No errors found.

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 15: Airbag Label File: RKS\6Q0-909-605-VW5.lbl
Part number: 6Q0 909 605 S
Part number: 0A AIRBAG VW5 03 0006.
Encoding: 12353
Operating number: WSC 31414
VCID: 47990BE54FDF

No errors found.

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 17: Combination instrument
Label file: RKS\6Q0-920-xxx-17.lbl
Part number: 6Q0 920 800 P
Part: COMBINATION INSTRUMENT + SPEEDOMETER VDO V11.
Encoding: 01131
Operating number: WSC 00000
VCID: 3A7F62110C2D
WVWZZZ9NZ2D01XXXX VWZ7Z0A4516555

No errors found.

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 19: CAN-Gateway Label file: RKS\6N0-909-901-19.lbl
Part number: 6N0 909 901.
Component: Gateway K<->CAN 1S31.
Encoding: 00014
Operating number: WSC 31414
VCID: F0EB00399AD1

No errors found.

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 44: Steering Assist
Label file: RKS\6Q0-423-156.lbl
Part number: 6Q0 423 156 AA
Component: Steering assist KYO X757.
Encoding: 10140
Operating number: WSC 00000
VCID: 6ED79E4100E5

-------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
Address 46: Comfort System
Label file: RKS\6Q0-959-433.lbl
Part number: 6Q0 959 433 H
Component: 1G Comfort Device 0001
Encoding: 00067
Operating number: WSC 31414
VCID: 408B10F96AF1

Part number: 6Q2959802A
Component: 1G Control Unit.FS TFK 0003

Part number: 6Q2959801A
Component: 1G Control Unit.BF TFK 0003

No errors found.

Ende
--------------------------------------------------------------------
End.

I've experienced this same issue with a Polo before.

Traded my cat today, let's see if it works.

Even a lot of short-distance driving can cause this problem!

What driving conditions is the vehicle exposed to?

Take a look at MWB 30 and the following entries in the label file of the engine control unit.

Best regards, Rainer.

I've created some logs here.

Best, Chris.

chli1976 wrote:

I also experienced this error with a Polo.

Today, I swapped the cat, let's see if it works.

Hi!

Has the error reappeared for you?
Could you possibly upload a few more so I have something to compare them to?

Best regards, Chris.

It was only two days ago.
So far, the error has not appeared, but it is probably too early to say anything definitive.

This is a log before I changed the cat, and I didn't create any logs after that.

chriskross wrote:

Address 01: Engine Label file: RKS\03E-906-033-AZQ.lbl
Part number: 03E 906 033.
Component: 1.2l/4V SIMOS3 00HS4340

Update the software; the current version should be at least 03E-906-033 @ 7000 (see TPI 2001227). Before that is done, the error detection can be

essentially thrown away...

Hello!

Unfortunately, I'm still experiencing this error even after the software update.

The error occurs approximately every 100 kilometers.

"At VW, they said that their diagnostic program only reported this error."
The KAT was renewed, but then the KAT and the entire system underwent a functional test to reset all readiness values, and all tests were successfully passed.

I'm not sure what to think or feel about it anymore.

What I did should have worked, but I haven't heard back from them.

I'll check the valve timing tomorrow, and then I'll probably have to replace the catalytic converter.

There will probably only be the original versions again; it's supposed to have three different versions.

The valve timings are also okay. I've cleaned the throttle body again; it was very dirty.

Here are the logs from the Lambda probes again. Perhaps someone can tell me what they mean.

Best regards, Chris.

I've moved the topic. In the meantime, we have

a more suitable subforum.