B0268HVAC Mode Door 1 Circuit
- Generic OBD-II code · Body
- How the car detects it
- B0268 is not in the published J2012 lists, but General Motors uses the number: bulletin PIP5094, written for 2014 and older GM cars and light trucks, includes it in its keyword list of body codes, without a descriptor. The mode door routes air to face vents, footwell or windscreen. GM's later Global A system files the mode actuator under B0233; B0150 and B0170 also exist for this door. Such actuators are often a DC motor with a geared potentiometer returning about 0 to 5 V, per MOTOR magazine; newer ones count commutator pulses instead. In Nissan Shatai's patent US4819715A one actuator sets a shutter to open the upper vents, the defroster or neither. A circuit fault leaves the door in its last position.
- What you may notice
- Air stays on one outlet, for example defrost, whatever mode is chosen
- Pressing the mode button no longer changes where the air comes out
- Likely causes
- LikelyMode door actuator motor or position feedback failed
- PossibleActuator over-travelling or binding at the door, overloading its drive
- RareActuator plug or wiring behind the dash open or shorted
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.