I had code 21,32,45 I replaced oxygen sensor,EGR valve and assembly,ECT sensor.TPS sensor I changed trans fluid and filter.fluid smell O.K. no burning . now I have code 37 only but in Haynes repair manual code 37 is for diesel engine
(code 45 transmission overdrive solenoid circuit malfunction) (code 37 TCC solenoid circuit open or shorted- code 37 transmission temperature sensor voltage signal above or below acceptable voltage values) thank you.