B0170HVAC Mode Door Position Sensor
- Generic OBD-II code · Body
- How the car detects it
- Searching the available J2012 lists and public manufacturer material turned up no entry for B0170 with this title. Unlike B0150, which concerns how the mode door moves, this code points at the sensor that reports its position. In most electronic climate actuators that sensor is a potentiometer on the gear train; a Motor magazine article puts its signal at about 0 to 5 V and notes that simple recirculation actuators often have none. Hyundai's patent US9960727B2 drives intake, temperature, mode and defog door motors until the feedback voltage matches the target and watches the motor current for stalls. A lost or noisy position signal leaves the module unsure where the door is, so it may stop driving it.
- What you may notice
- Air distribution stays fixed in one position
- Actuator runs repeatedly or ticks after switching on
- Likely causes
- LikelyWorn or dirty potentiometer track inside the mode actuator
- PossibleFeedback signal, 5 V supply or reference wire open or shorted
- RareBent or pushed-back pin in the actuator connector
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.