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B1448 on the 2017 Toyota LAND CRUISER

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.

Bulletins for this model year that name B1448
T-SB-0002-212021-02-16. Service bulletin. TSB: Some 2016 ? 2017 model year Land Cruiser vehicles may exhibit one of the following HVAC conditions: ?Uneven temperature or air flow between the vents. ?Little or no air flow from the vent(s). ?Improper MODE control function. Additionally, some vehicles may store one or more of the following HVAC servo Diagnostic Trouble Codes (DTCs): ?B1441 ? Air Mix Damper Control Servo Motor Circuit (Passenger Side). ?B1442 ? Air Inlet Damper Control Servo Motor Circuit. ?B1443 ? Air Outlet Damper Control Servo Motor Circuit. ?B1445 ? Passenger Side Cool Air Bypass Damper Control. ?B1446 ? Air Mix Damper Control Servo Motor Circuit (Driver Side). ?B1447 ? Rear Air Mix Damper Control Servo Motor Circuit (Driver Side). ?B1448 ? Passenger Side Face Servo Motor Circuit. ?B1449 ? Rear Air Outlet Damper Control Servo Motor Circuit. ?B1457 ? Driver Side Air Outlet Damper Control Servo Motor Circuit. ?B1458 ? Passenger Side Air Outlet Damper Control Servo Motor Circuit. ?B1486 ? Driver Side Air Outlet Damper Control Servo Motor Circuit. ?B1488 ? Rear Air Mix Damper Control Servo Motor Circuit (Front Passenger). Follow the procedures in this bulletin to address these conditions.
T-SB-0048-202020-06-22. Service bulletin. TSB: Some 2017 ? 2019 model year Land Cruiser vehicles may exhibit one or more of the following HVAC conditions: ?Uneven temperature or air flow between the vents ?Little or no air flow from the vent(s) ?Improper MODE control function Additionally, some vehicles may store one or more of the following HVAC servo Diagnostic Trouble Codes (DTCs): ?B1441 ? Air Mix Damper Control Servo Motor Circuit (Front Passenger Side Lower Air Mix) ?B1442 ? Air Inlet Damper Control Servo Motor Circuit ?B1443 ? Air Outlet Damper Control Servo Motor Circuit ?B1445 ? Passenger Side Cool Air Bypass Damper Control ?B1446 ? Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix) ?B1447 ? Rear Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix) ?B1448 ? Passenger Side Face Servo Motor Circuit ?B1449 ? Rear Air Outlet Damper Control Servo Motor Circuit ?B1457 ? Driver Side Air Outlet Damper Control Servo Motor Circuit ?B1458 ? Passenger Side Air Outlet Damper Control Servo Motor Circuit ?B1486 ? Driver Side Air Outlet Damper Control Servo Motor Circuit ?B1488 ? Rear Air Mix Damper Control Servo Motor Circuit (Front Passenger Side)

2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.