i found it thank you so much i found that the reference 5 pcm which coded B the wire is purple on o2 sensor connector is lose i pulled it and it was internally disconnected from the pin any way i fixed it relocated the cable to the connector and connected it to find the 540 mv is no more stuck at 540 or 560 and back to 680 mv and down i mean it was switching just like it should and for the P0140 is passed from CEL and the problem is fixed i wish you add pics upload so i can send the pics for the fix but any way thanks in advance