Always at 4200 RPM, doesn't matter what gear I'm in. What could it be?

Last year Honda replaced the passinger seatback cover pad and light went out. the code was 86-22 on the test.Honda covered it under the warranty.Now the light is back on.A different Honda dealer says code 86-22 comes up again.they want to replace ODS unit and SRS unit for $1200.Could this be a faulty seat back cover pad again.Or could it be a seatbelt issue.Thanks

battery dead, wend I jump it , wont start, code p2101

Put two thermostats in it and a new headA new head gasket new head

Recently when I start my Crossfire, a wrench pic with '25' appears initially in the odometer LED. After approximately 15 seconds it disappears and the usual odometer numbers appear. It has 29,780 miles only. It drives perfectly. What repair does it need?

Part already primed/painted. Install handle only. I will do panel later