Dreaded Emissions Test and P1317- ABS Rough Road
I had an Emmisions test recently on my '97 SW and failed because my Engine Light came on just as the Technition was driving my 90 over the treadmill bumps to get to the test equipment. No sniff test here, as long as it has an OBD-II port, they hook up to that. Any check engine or service engine light on at the time of the test will cause an automatic failure. The Engine Light is do to a persistant Speed sensor problem triggering P1317 ABS Rough Road Line Low Fault. I have a OBD-II scanner and have just been clear the faults out. I have cleaned the speed sensors in the front and back. I keep getting the fault again and again. I have noticed that while the front speed sensors filt all the way in flush into the swivel ball housing, the rear speed sensors stick out of their sockets by about 1/3 to 1/2 inch. I have tried pressing and them in but they just don't seem to fit in flush. I measured how deep the socket hole is, and if I press the sensors in any more, they will hit the sensor ring. Does this seem correct? Are they suppost to stick out like this. I am the second owner of the 90. I am not sure if the sensors were replaced in the past or not, and if the wrong ones are installed in the back hub assemblies.