Powertrain, generic (extended)

P2E24 Drive Motor A Phase Z Current Sensor Circuit Range/Performance

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2E24 concerns a phase Z current reading of drive motor A that passes the electrical checks yet fails a plausibility test. No manufacturer documents P2E24 publicly. Z completes the second winding group of a two-group motor; in the Mitsubishi Electric patent X, Y and Z are star-connected and controlled separately from U, V and W, so a biased Z sensor upsets only its own group. GM's 2019 hybrid table shows the typical test on the U/V/W side: the offset learned while no motor current flows must stay within 35 A, otherwise the code sets after 0.4 s, Type A. Ford also uses the motor phase sensors to confirm that the three AC leads are connected correctly, so a skewed reading can look like a wiring problem. Circuit: P2E23; low and high: P2E25, P2E26; group sum: P2E27.

Likely causes

Zero offset of the phase Z sensor drifted

Gain error of the phase Z sensor

Faulty measuring stage on the inverter control board

Symptoms

Hybrid warning lamp and MIL
Electric drive limited
Uneven torque or motor noise

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