Hi, so far it has been 2 times that the “Check Engine” light was on. On the first time she was working for a short time for 20 minutes, now, about 2 weeks later she was constantly working. A visit to the workshop revealed that the Lambda probe was apparently defective. Now the curious thing: After reading the error, the light no longer appeared. My question now: should I have the probe replaced or not? And: what does it mean if I were to drive with a defective probe? For a new one would be e pay 200 EUR including installation – seems to me to be a bit much? Thanks for the answers! Philipp