samedi 26 juillet 2014

02 lambda sensor

Hi all hope you can help on this one.



my 55 scenic 2 1.6 petrol is overfueling so i have changed both o2 sensors, i have now found that the first one is giving the varying .2-.8v output and displays on my live scanner as a varying value.



The second is giving .4v when the engine is off and rises steadily when the car is running upto .8v but the scanner stays at .465v (which i assume is the default no voltage input value).



I have traced the voltage upto the ecu and its all good it goes in on the same plug as the first and ive checked the earth continuity on the ecu and all looks good.



Any suggestions would be appreciated im going to order a replacement ecu on monday but anything i can try firrst would be great to confirm its the ecu, or am i missing anything?



thanks for any help!!




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