Powertrain, generic (extended)

P2E1D Drive Motor A Phase X Current Sensor Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2E1D says the phase X current sensor signal of drive motor A lies below its lowest valid value. Phase current flows in both directions, so the sensor reports a signed quantity; low therefore means a reading more negative than any real current, not a weak current. That other case, too little current in an energised phase, is P2C6A. No manufacturer documents P2E1D publicly. GM's U-phase counterpart on the 2016 Volt trips below -700 A for 0.05 s within a 0.1 s window, Type A, MIL after one trip. Such a value points to the measuring path: a signal shorted to ground, a lost sensor supply or a failed sensor inside the inverter. Where such a sensor sits is shown in a Mitsubishi Electric patent: on the lead from the inverter to the X winding. Expect a hybrid warning and reduced drive. High side: P2E1E.

Likely causes

Sensor signal shorted to ground inside the inverter

Supply voltage of the phase X sensor missing

Phase X current sensor failed

Symptoms

Hybrid warning lamp and MIL
Sharp loss of electric drive power
Vehicle may only drive in a reduced mode

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€200–5,000

Time1–6 h

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

Parts involved

drive motor a phase x current sensorwiring harnesshybrid control module

References: gsi.ext.gm.com, image-ppubs.uspto.gov.