HAVE 4 DTC'S.DO I HAVE TO REPLACE SENSORS

MIL DTC 37 Transmission temperature sensor voltage out or range (too high or too low) (Trucks/Vans/Diesel 1993-96) Conditions For Setting This Code: Possible Causes: Monitor Information: Stored Codes 21 Right or left bank, upstream or downstream oxygen sensor, stays at center (no rich or lean signal detected when in closed loop), shorted to voltage, shorted to ground, slow response or heater failure (Cars 1996-97) (Trucks/Vans Jeeps 1996-97) Conditions For Setting This Code: Possible Causes: Monitor Information: 41 Alternator field control circuit problem (Cars 1983-97) (Trucks/Vans 1987-97) (Jeeps/Diesel 1993-97) Conditions For Setting This Code: Possible Causes: Monitor Information: 24 Throttle position sensor (TPS) signal voltage out of range (too high or too low) (Cars 1983-97) (Trucks/Vans 1987-97) (Diesels 1992-97) (Jeeps 1993-97)