Powertrain, generic (extended)

P2E2A Drive Motor A Excitation Current Sensor Circuit High Voltage

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Sensor signal line shorted to a supply voltage
Open sensor ground or reference connection
Failed sensor output stage

Symptoms

  • Electric drive warning lamp on
  • Reduced or no drive power
  • Fault returns immediately after clearing

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–4,000
Time1–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

drive motor a excitation current sensordrive motor a excitation circuithybrid control module

Related codes

P2E7BP2E28P2E29P2E2B

References: ti.com, newsroom.bmwgroup.com, law.cornell.edu.