Halse

Thanks for the tip. Any further comment on the obd read-out would be appreciated. It reads in the bottom of the screen b1-s1 "not ok" ( believe that is bank 1 sensor 1). If there was an exhaust leak could this cause the sensor to throw the 'not ok' reading?

Hi All, Some months ago the Fabia failed the emissions test with a recorded lambda value of 0,73. I since had a friend connect a scan tool to understand better what is causing the problem. From the attached picture one can see that sensor b1-s1 is 'not ok'. Could this be the likely cause? The particular Fabia is the 1,2l 64hp petrol. Thanks, Halse

Here is what the engine bay looks like. Would that be a twin cam? My friend thinks it may be the idle controller valve that might cause the problem (not letting enough air through at idle). Otherwise will check the exhaust coupling. Apart from low lambda the CO emissions at high idle were measured to 8,7% (the limit for fail is 0,2%)

Not sure, will check the plugs later in the day. The model is Fabia Ambiente 1.2, variant SCBMEX01 and version NFM5FM52T037L13S0G.

Correct the code is 16726, and yes I thought also about the timing chain as a possibility. Just in favor of ruling out the simple things first.

I pulled the camshaft sensor out to test it and it does react to create a signal voltage, but it could be that it does not send a strong enough signal

Only fault code that shows up is 16762 related to camshaft sensor

Greetings all! I have a 2006 Fabia 1.2. It failed emissions test with Lambda value 0.73 (a pass should be btw 0.97-1.03). I cleaned the map sensor and now the voltage of the O2 sensor in vcds reads 0.82v. Does anyone know if the voltage read corresponds to the lambda value (that means 0.82v = 0.82 lambda)? I am thinking the best start would be to look for vacuum leaks. Would anyone have advice in this regard? Thanks, Halse