BFQ 1.6 Petrol Engine

Hello, DIY enthusiasts!

I have here an Octavia 1 from 2005 with BFQ 1.6 8-valve engine, currently with almost 190,000 km, the original owner until today, and this error has appeared periodically since around 45,000 km:

Monday, 02 October, 2017, 11:39:39:22077
VCDS -- Windows-based VAG/VAS emulator runs on Windows 10 x64
VCDS Version: RKS 17.1.2.0
Data Status: 20170131 DS267.1
http://shop.dieselschrauber.de

Dealer/Workshop Name: VW
Operating number: 010 00032 000010

Odometer: Repair order: Dietmar octi



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Address 01: Engine Electronics Label file: DRV\06A-906-033-AVU.lbl
ECU Part Number: 06A 906 033 DM
Part and/or Version: SIMOS 33 1.6l 2V 00HS5791
Encoding: 00031
Work Order Number: WSC 73430
Extended Information: TMBJX21U558813890 SKZ7Z0E2958960
VCID: 6DD59EA627C7C32938-5124
1 Error found:

16514 - Bank 1 Probe 1
P0130 - 35-00 - Electrical Malfunction in the Circuit

Readiness: 0010 1001

After a long time, the "Sporadisch" (intermittent) issue reappears.

On long journeys of over 200 KM or on hot days, the MIL (Malfunction Indicator Light) may occasionally turn on and off by itself - the error disappears on its own, but on cooler days, it may occasionally come back with this error. "Consumption is normal, no oil consumption, does not jerk, emissions values and lambda value are verschandeln at 1.0000 and CO 0.01, HC 8-11"

Back then, Skoda replaced both lambda sensors, the catalytic converter, and the intake manifold, but it didn't help at all.
I have repeatedly checked the intake manifold for air leaks using brake cleaner, followed the smoke with a burning match, etc. I finally found the problem at the catalytic converter, and I thought that the leak at the weld where the sensor was located was the cause: I welded it, but unfortunately, the problem still occurs. The exhaust manifold from the sensor to the catalytic converter is 100% leak-proof.

Installing a test lambda probe before and after the cat did not work, unfortunately.

Measured the cable all the way to the MSTG and moving the cable bundle didn't help.

The owner doesn't care, because the car runs perfectly and without any problems, even the MIL (Malfunction Indicator Light) no longer bothers him, but I am VERY interested in what the actual problem is, in the first place?

When I perform the readiness test, it works perfectly.
Having searched through various forums for this error, I've found very few solutions

I would have also guessed "lambda probe" because it was exactly the same error. The sensor was replaced and the problem was solved. Could you replace the sensor? What do the contacts on the connector do?

Have you ever measured the probe?

Either replace the Lambda sensor connectors, as there are some with gold contacts, or replace the cables to the control unit. Measuring only works if the cable is disconnected, if there are contact problems, or if the cable is damaged due to insulation problems. In these cases, measuring usually doesn't provide useful information.
Or did you test it with a load?

@Bergamount
The lambda sensor is supposed to have just arrived.

If there is no electrical fault that can be found: I am not 100% sure, but there should be software version 7290 for that control unit.

dieselschrauber wrote:

If the electrical fault cannot be found: I am not 100% sure, but there should be software version 7290 for that control unit.

Okay, if the box is back here, I'll check the software version. It probably doesn't make sense to pay for an update on an old system.

chli1976 wrote:

Either replace the Lambda sensor connectors, as there are some with gold contacts, or replace the cables to the control unit. Measuring only works if the cable is disconnected, if there are contact problems, or if the cable is damaged due to insulation problems. In these cases, measuring usually doesn't provide useful information. Or did you test it with a load? @Bergamount The lambda sensor should have just arrived

Plug, cable up to MSTG is functioning normally, also testing with both probes separately didn't show any issues...

Are OEM probes installed or universal probes?

Is there possibly a blockage in the exhaust system?