P2E2ADrive Motor A Excitation Current Sensor Circuit High Voltage
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2E2A is the counterpart to P2E29: the signal from the sensor that measures the rotor field current of drive motor A sits above the highest voltage a working sensor can deliver. Typical reasons are a signal line touching a supply rail, an open ground or reference connection that lets the input float up, or a failed sensor output stage. Electrically excited traction motors, such as BMW's fifth-generation eDrive units, rely on this measurement to set rotor flux, because the field current sets how strong the rotor's magnetic field is. No manufacturer documents P2E2A publicly. It must not be confused with P2E2B, where the current itself is too high; a merely implausible value is P2E28. Expect a drive system warning and loss of power from this motor until the fault is repaired.
- What you may notice
- Electric drive warning lamp on
- Reduced or no drive power
- Fault returns immediately after clearing
- Likely causes
- LikelySensor signal line shorted to a supply voltage
- PossibleOpen sensor ground or reference connection
- PossibleFailed sensor output stage
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.