Hello forum participant, with my car, Volvo V70, BJ 01/2000 2.4ltr, 103 kw, burns the engine control warning light. Error readout brought to the friendly : front Lambda probe, fluctuating signal. The friendly called up his price for a Lambda probe on .. frighteningly high. I have now installed an original BOSCH Lambda probe (universal sonde, matching lt numbers to the engine), the cable properly connected, while working the battery disconnected so that the fault spoke R is regenerated. LEIDER …. burns the engine control problem lamp again!!!! After the installation started, everything ok, no lamp. 100 m driven: LAMPE. Now my question: 1.) Can an original, new BOSCH SOnde be defective? 2.) Is it not enough to clamp the beterie to delete the error memory? 3.) Does the friendly person therefore possibly have to reset the error memory via his diagnostic device? … I exclude the wrong installation of the cable from the probe, because ic h made this step very conscientious. My current concern, conjecture: In my car already the new 2.4 liter engine is installed, as it is inside the V70-II. EVTL. I now have a lambda probe of the “old” V70 engine although the free part dealer has also determined the “right” BOSCH number from his system. I have this thought, because the VOLVO number on the old SOnde is a completely different one than the 4 , which BOSCH states as comparison numbers. I hope for a few good e Tips and answer and thank me very much for the help. Greetings Hensch