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DTC codes / P2Exx · Hybrid propulsion / P2E24

P2E24Drive Motor A Phase Z Current Sensor Circuit Range/Performance

P2E24 indicates that the inverter controller for drive motor A has detected an out-of-range or erratic signal from the phase Z current sensor circuit, which monitors current flow in one of the motor's three phases. The computer compares the sensor's reported current against expected values derived from motor speed, torque request, and the other phase sensors, and it sets this code when the signal falls outside a calibrated window or fails a rationality check.

SystemPowertrain
Code typeGeneric (all makes)
SeverityHigh
Fix difficultyProfessional
AreaHybrid propulsion

Symptoms you may notice

  • Illumination of the hybrid or electric vehicle warning light, often with a message to service the drive system
  • Reduced power output or a limp-home mode that limits vehicle speed
  • The vehicle may refuse to start or shift into drive if the fault is active at key-on
  • Intermittent hesitation or shudder during acceleration under load
  • Often no symptoms besides the warning light, especially if the fault is stored but not currently active

Common causes, most likely first

  1. A failing phase current sensor or its internal electronics
  2. Damaged or chafed wiring between the current sensor and the inverter controller
  3. Corroded or loose connector pins at the sensor or inverter harness
  4. A faulty inverter controller or motor control module
  5. Electrical interference or a poor ground affecting the sensor reference voltage
  6. Moisture intrusion into the sensor or connector causing signal drift

How to diagnose and fix it

  1. Connect a scan tool and record all stored codes, freeze-frame data, and live current-sensor readings to confirm the fault is present and not a historical glitch
  2. Visually inspect the phase current sensor, its connector, and the harness for chafing, corrosion, or loose pins, repairing any obvious damage
  3. Measure the sensor reference voltage and ground at the connector with a multimeter, comparing against the manufacturer's specification
  4. Back-probe the sensor signal wire and compare its voltage or waveform with the other phase current sensors while the motor is loaded
  5. Perform a wiggle test on the harness and connectors while watching live data to expose intermittent faults
  6. If the signal is erratic but wiring and connectors are sound, replace the phase current sensor and clear the codes
  7. If the fault persists after sensor replacement, diagnose the inverter controller or motor control module according to the service information

What the phase current sensor code hides

  • A phase current sensor can pass a static resistance check and still fail under load, so live data during a road test is more revealing than a bench test.
  • The code often sets from a momentary signal glitch caused by a loose connector pin that only acts up over bumps, so a wiggle test is essential before condemning the sensor.
  • A weak 12-volt battery or a poor chassis ground can pull the sensor reference voltage low and trigger this code without any fault in the sensor itself.
  • Technicians sometimes replace the inverter controller when the real problem is a chafed signal wire inside the motor harness, so always trace the circuit end to end.
  • This code can be stored alongside motor position or resolver codes when a shared ground or reference circuit is compromised, so check for companion codes before diagnosing.

Can I keep driving with P2E24?

Do not continue driving with an active P2E24 because the inverter may misjudge phase current and cause a sudden loss of power or an unsafe shutdown. If the light is on but the vehicle drives normally, limit driving to a short trip to a repair shop and avoid hard acceleration or high-speed operation.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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