P28E7 code meaning
Shift Motor Position Sensor Circuit/Open
Powertrain system Generic code P28xx codes Check engine light
What P28E7 means
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.
P28E7 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P28E7
- Shift system warning in the cluster
- Gear display missing or wrong
- Vehicle refuses to shift or does not start
Common causes of P28E7
- Most likelyPosition sensor connector loose, corroded or unplugged
- PossibleSignal, supply or ground wire of the sensor broken
- PossiblePosition sensor failed internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift motorShift motor position sensorTCM
What each part of P28E7 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8 | Area: transmission. |
| E7 | The exact fault in that area. |
What to do next
- Note P28E7 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P28E7
What does P28E7 mean?
P28E7 means "Shift Motor Position Sensor Circuit/Open". The shift motor position sensor tells the controller where the selector shaft of a shift-by-wire actuator stands. It is a generic code, so it means the same on every make.
Is it safe to drive with P28E7?
Drive gently and only to a workshop. With P28E7 the car can go into limp mode (reduced power) to protect itself.
Will P28E7 fail an emissions test?
P28E7 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P28E7 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P28E7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.