The Code 37 is a problem with the passengers Airbag. This is a repair for an expert because you do not want it to deploy while you work on it. You may though be able to switch off that side of the safety bag and have the warning light go out.
For the engine speed up there should be no connection. Both Autozone and Oreillys will do a free scan on your vehicle to diagnose your engine problems. If you get a defect Code from them you can follow their advice or use the reply function to contact us for more help.
I hope you find my Solution helpful. There was a TSB 04-26-12 about connections for the Airbag circuit, Published 12-31-04. It may jog the memory of the Dealer and help them repair you car.
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