Hello dear workshop consultant, my 99er Mondeo, 1.8l Benz. has for a few weeks been an annoying skimmer, i.e. between 1500 and 2500 tours and little gas rolling away is accompanied by more or less noticeable backpackers. The same in the stand and running air conditioning: engine runs round and shakes lightly. Without load you notice nothing. The workshop moved with the laptop and established defective Lambasonden heater (error p0135). esseser (was claimed), which did nothing. Then the harness rang through, lines pulled separately, further mass pulled: same error message, same error picture. Claim at the end: The PCM module must be new, makes 1000+ EUR. For testing purposes, one cannot use: they come out of the warehouse unprogrammed (wg. immobilizer) and have to be programmed, which only once goes on. Risk that it is not then, one does not want to take on itself. I also do not. Is (afaik) only there for the warm running phase. There must be something else. False air, some sensor macky, etc.. Candles are new, of course brought nothing. Ignition cable? Whether outside moist or not doesn’t matter, so it can’t actually be. Throttle flap pots I have ohms appropriate, could not detect jumps or dropouts. Range 1.5k – 4kOhm, depending on the throttle position. Has an idea how to here Is it possible to proceed systematically?