I am having issues with my airbag light, TPMS, and brake lights coming on... I start my vehicle and get airbag warning and/or light. Most times I can turn off the car, and re-start it... which the light will go away. Some days it is the TPMS light that would come on, and all pressures are blank. I can do same process in which I turn off the car and restart it, and the light will go out, and all info would then sjow up correctly. I've also had a couple instances with the "brake" light illuminating as well. Any ideas are greatly appreciated. Also, are there any low cost OBD devices that might help point out possible culprits?