Long crank, smells petrol, O2 sensor fault

[vukasinov]

Hello everyone,

I have a long crank issue. When cold, the engine turns for 1-2 seconds, but then it runs normal.

Now I've got a P0036 code - Heater control circuit - the O2 sensor after the catalytic converter.
MIL inticated on the dash, cleared in VCDS but it comes back the next day.
So far I've replaced the low pressure fuel pump...

I'm guessing something is broken in the fuel system? I need some advice on this problem...

Thank you in advance!

 

[ROH ECHT]

With VCDS, load MB 033 when engine is warm. At warmed idle, the value in Group 2 should swing/bounce near 0.45v and stay between 0.1v and 0.9v (to near 1.0v). Then, when looking at the data screen....fully press the throttle quickly and watch the volts in Group 2. The Group 2 volt value should drop to near 0.1v. If the value is not within spec...replace the second (post MAF) O2 sensor. Inspect the wiring to the O2 when replacing the sensor.