Powertrain, generic (extended)

P2E25 Drive Motor A Phase Z Current Sensor Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2E25 means the phase Z current sensor of drive motor A reports below its valid minimum. No manufacturer documents P2E25 publicly. A zero reading is not the same thing: if phase Z carries no current because a lead is open, the sensor correctly reads about zero and the open phase is judged by P2C70. Low here means beyond the negative end of the scale; GM places that limit for its U/V/W sensors between -440 A on eAssist and -800 A on the 2016 Cadillac ELR. When X and Y log low codes as well, a common cause such as the shared sensor reference or a ground in the inverter's low-voltage wiring is more likely than three failed sensors; Ford, for one, watches that reference separately. High side: P2E26.

Likely causes

Phase Z sensor signal shorted to ground

Shared sensor reference or ground faulty

Phase Z current sensor failed

Symptoms

Hybrid warning lamp and MIL
Reduced electric drive
Low codes of other phases possibly stored too

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 z current sensorwiring harnesshybrid control module

References: gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com.