Passat b5 fl 2.0 115km - G28 crankshaft position sensor and LPG system ....

Hello, I have a problem in Pasat with burning "check engine" lights and with this worse "triangle in a circle", I am fresh after installing BRC gas, the whole set, the problem is that after the gas installation began to appear error message crankshaft position sensor "16719-crankshaft sensor G28 P0335-35-0-malfunction - Sporadic" this was shown to me by VCDS without thinking much I took it for replacement, admittedly not for a new one and for a drug, and unfortunately still an error so I do not know what's going on or used also damaged, I wonder that all this started to happen after the gas was installed as soon as I left the workshop, the above-mentioned indicator goes out while driving and lights up, I noticed that during acceleration the car sometimes catches the mule literally for a moment and that's when this error occurs, 2nd issue is the check engine VCDS control shows "low catalyst performance" I used this emulator for 2 lambda sensors but it will give Funnel the same, in summary, does the shaft sensor indicator have something to do with gas assembly or is it a coincidence? maybe 1 lambda probe damaged? maybe a catalyst? I will add that the check was already burning before the gas installation, a little too many of these "maybe" will come out that I need to replace half the car may not need, maybe the gas is not properly set, wrong map or something like that, maybe someone will advise me what to pick on, thanks in advance

Check sensor power supply and check signal cable under load - cable between sensor plug and ECU plug.

Norbert199137 wrote:

I would add that the check was already on fire prior to gas assembly

gas is assembled to a functioning car. Katy in this engine is the norm and the "emulator" does not work.

In my bore, the gasifier had to take the signal from the shaft because, as I had from the shaft, after switching on the ignition, the ECU would switch on the fuel pump every now and then.

Willing to burn before installing LPG but for what reason?
I have not yet met a gasifier to plug into the shaft sensor, they usually take the signal fed to the HV coil.

Check before assembly burned due to low catalyst capacity at least as indicated by VCDS, but immediately after installation of the gas appears a turning and dying switch "triangle in a circle" the computer showed a defect in the G28 crankshaft position sensor (sporadic) I replaced the sensor and then the same can other causes of this error than defective sensor? puzzling is the fact that the error showed up right after the gas assembly, and I wonder if it is related

They may have got stuck in the shaft / shaft sensor and it is causing interference.

is this cable between the computer and the connector that connects to the sensor plug? this is a clue I will explore this topic tonight and additionally I will go to the workshop where they assembled the gas and ask where they connected let me know what and how

Hello
In Seat Leon I had the same thing but without Lpg.
This sensor was damaged.
Early exchange of the flexible exhaust joint.
Every now and then lambda probe, EGR, throttle and sparks fail.
So everything in turn.
Diagnostic mechanic this sensor ..... for a new reset ECU adaptation of everything and playing music.

grala1 wrote:

I have not yet met a gasifier to plug into the shaft sensor, they usually take the signal fed to the HV coil.

You see, Arthur did this to me and explained that the signal on the coil is very disturbed for gas and can even damage the ECU of the car by such a connection.

In wife 2.0 AQY is taken from the coil. In my 1.6 AKL I had the same.
In cars where there was no CAN yet, one could take the signal going from the ECU to the counter for the tachometer.
I see no problem to give the optocoupler there and secure both devices.

He gave it with a roller and it's ok too.

Hello, the problem solved by switching from the g28 crankshaft position sensor to the camshaft position sensors, after that no errors, etc., the gas was very surprised that he always connects to this sensor and there are no problems, but he was not sure that this is the reason due to my and your theories I recommended to connect to the camshaft sensor and as it turned out right ... and I will add that emulator of 2 lambda probes, however, probably helped, but now there is no error "check engine" and after connecting to Vcds no information about the low performance of the hangman, maybe for some time there will be peace of mind with it, thank you in advance for help the topic solved maybe someone will be useful Regards

Suspects that the position sensor signal voltage has dropped.
And the ECU read it as 0000 instead of 0101 as a computer.