B0273HVAC Recirculation Door Circuit
- Generic OBD-II code · Body
- How the car detects it
- B0273 could not be traced in the code lists at hand, nor in any manufacturer publication. The title concerns the electrical circuit of the actuator that swings the intake door between outside air and cabin air. Saab uses its own numbers here: in the 9-3 climate module B0225 06 stands for an open or grounded recirculation motor circuit and B0226 01 for a line shorted to battery voltage; the 2011 Saab 9-5 (GM) reports the stepper command lines as B0223/B022A. Patents such as US5181553A and US8641490B2 show the intake door driven by its own motor on command of the climate controller. With the circuit dead the door stays where it last stopped, which can mean stale air, fogging windows or weak cooling. B0175 covers door performance rather than the circuit.
- What you may notice
- Recirculation button changes nothing at the air intake
- Windows fog up or outside odours enter the cabin
- Reduced cooling on hot days
- Likely causes
- LikelyRecirculation door actuator motor burnt out or internally open
- PossibleActuator wiring behind the glovebox chafed, shorted or unplugged
- RareDoor jammed by leaves or debris so the motor stalls at high current
- RareDriver stage in the climate control module defective
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.