you can get used to the lights being on like i have until i get to fix mine. this is a common problem. in most cases you have to get the sensors off the frame (one on each side), clean the frame and the bottom of sensor, and apply a coating of dieselectric grease and reinstall. unless the sensor is bad which is usually not the case this is the fix. make sure you d/c connect the battery first. the one on the left side is behind the battery on the frame and the right side is even with it.
i thought, when i did mine, because the 90 only had one airbag that there was only one. haven't had a chance to do the right side yet.
not a hard job to do. good luck with it and if you need any other info let me know.
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the dynamic duoc3vr life member #97