An interesting thing arose this afternoon which high lighted something I raised a while ago re M.O.T. exhaust emissions. I tested a 2011 BMW 318 Touring. This car is the E91 model and has the N43 B20 A engine, which has only covered 18,000 miles, the BET test failed on lambda and automatically puts the analyser into Full Cat Test Mode. The interesting thing to note is that the parameters for the Lambda emission is opened up, A LOT. The BET test has 0.07 - 1.03, if you look at the picture it shows 0.07 - 4.00, this appears after you enter the specific vehicle data. Strange that BMW can't get their cars to reach the same standards as other manufacturers do? The Mini has similar issues too, also the 1 series has the same affliction.
Also notice that the CO emission is 0% and this does affect the lambda reading, so perhaps they run too clean?
Tony.
Also notice that the CO emission is 0% and this does affect the lambda reading, so perhaps they run too clean?
Tony.