I commonly see them failed on Vauxhalls (or Opels in Europe). Causes stumbling, stalling, low power, occasional check engine lights and the like.

Their self-diagnosis is only so-so at correctly detecting the problem.

Pentoman : I assume you are refering to the sensor itself. Is there anything else that can interrupt this signal?

From what I found out this sensor is needed for engine to run at all. From the ezl the signal is split to fuel pump relay and tachometer. So either it's the sensor itself OR the ezl module, right?