Compatible fault code scanners?

[zago]

Fuse 38 is ok. Yesterday charged battery. Engine suddenly started and engine oil warning light (red) pop up. Disconnected oil pressure sensor. Engine not starting. Connected oil pressure sensor again. Engine not starting again. Besides found service flap switch positive terminal broken. Should i change oil pressure sensor? Vcds shows the same faults nothing new

 

[zago]

One more thing. When the engine started i noticed that rpm on dash works very strange “pulse” and after few seconds rpm shows 0 even on high revs

 

[Dave M]

That's could be a sign of the crank shaft sensor being faulty.

 

[PlasticMac]

That's could be a sign of the crank case sensor being faulty.

Definitely suspect crankshaft sensor.
Mac

 

[zago]

One more thing. When the engine started i noticed that rpm on dash works very strange “pulse” and after few seconds rpm shows 0 even on high rev

One more thing. When the engine started i noticed that rpm on dash works very strange “pulse” and after few seconds rpm shows 0 even on high revsLoo

Fuse 38 is ok. Yesterday charged battery. Engine suddenly started and engine oil warning light (red) pop up. Disconnected oil pressure sensor. Engine not starting. Connected oil pressure sensor again. Engine not starting again. Besides found service flap switch positive terminal broken. Should i change oil pressure sensor? Vcds shows the same faults nothing new

Looks like i need 612 relay to start the engine.Does anyone knows where to buy ? 8z0906383