P28E7Shift Motor Position Sensor Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- The shift motor position sensor tells the controller where the selector shaft of a shift-by-wire actuator stands. In a Denso patent it is a contactless magnetic sensor on the detent plate with two independent units, so two signals reach the ECU; Hyundai notes in bulletin 22-AT-001H that the readings of its two position sensors should add up to roughly 100 percent. P28E7 marks a broken circuit: no usable signal arrives, typically because the signal, supply or ground lead is interrupted or the plug has been pulled. No manufacturer documents P28E7 itself publicly; Kia uses the High variant P28E8. CARB requires circuit checks on inputs. Without a confirmed position the system cannot verify Park, so it may refuse to shift or to start.
- What you may notice
- Shift system warning in the cluster
- Gear display missing or wrong
- Vehicle refuses to shift or does not start
- Likely causes
- LikelyPosition sensor connector loose, corroded or unplugged
- PossibleSignal, supply or ground wire of the sensor broken
- PossiblePosition sensor failed internally
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.