hello all,
I have this vw beete, keep getting the trouble code P0135 o2 sensor bank 1 no activity.

now i gone through live data and found o2 sensors to be operating within range and pretty good, the customer has put 2 genuine sensors on. iv found the car to have a little misfire every now and again. the mil light comes on when driven for about 15mins, water level drops over a period of time. im suspecting head gasket will be doing the test tomorrow. but need to rule out every aspect first.

does the maf contribute to this code?

thanx in advance.

regards
mike