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DTC codes / P0Exx · Hybrid propulsion / P0E24

P0E24Drive Motor Inverter Temperature Sensor G Circuit Range/Performance

P0E24 indicates that the powertrain control module has detected an out-of-range or erratic signal from the temperature sensor circuit labeled 'G' for the drive motor inverter, which is the component that converts direct current to alternating current for the electric traction motor. The computer compares the sensor's voltage or resistance against expected values and flags this code when the reading falls outside the normal operating window or behaves inconsistently.

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

Symptoms you may notice

  • Illumination of the check engine light or service vehicle soon message, often with no other noticeable symptoms
  • Reduced power output or a limp-home mode triggered by the inverter's self-protection strategy
  • Intermittent stalling or sudden loss of propulsion while driving, especially under load
  • Overheating warning message or a noticeable drop in electric range if the inverter derates
  • Rough operation or hesitation during acceleration as the inverter limits current to protect itself

Common causes, most likely first

  1. Faulty temperature sensor G inside the inverter assembly, causing an open or skewed resistance reading
  2. Damaged or corroded wiring harness between the sensor and the control module, including chafed insulation or loose pins
  3. Poor electrical connection at the sensor or module connector due to water intrusion or vibration
  4. Internal fault in the inverter control module affecting the sensor reference voltage or signal processing
  5. Coolant flow restriction or air pockets in the inverter cooling circuit that cause genuine overheating and sensor range errors
  6. Software calibration issue in the control module that misinterprets valid sensor data

How to diagnose and fix it

  1. Connect a scan tool and record all freeze-frame data for P0E24, then clear the code and test-drive to see if it returns under specific conditions
  2. Visually inspect the inverter temperature sensor G connector and harness for corrosion, loose pins, or chafed wires, repairing as needed
  3. Measure the sensor's resistance or voltage at the connector and compare it to the manufacturer's specification for the current temperature
  4. Back-probe the signal circuit at the control module to check for continuity and voltage drop, isolating whether the fault is in the wiring or the sensor
  5. Check the inverter cooling system for proper coolant level, flow, and bleed procedures to rule out genuine overheating
  6. If the sensor is integral to the inverter and not serviceable separately, follow the manufacturer's procedure to replace the inverter assembly or sensor
  7. After repair, clear codes and perform a road test with a scan tool monitoring the sensor G value to confirm it tracks realistically and the code does not reset

Hidden causes of inverter sensor G faults

  • A common misdiagnosis is replacing the entire inverter when the actual fault is a chafed wire in the harness near a sharp bracket or heat source, so always perform a wiggle test on the harness while watching live data.
  • Genuine overheating from a clogged inverter coolant passage or a failing coolant pump can set this code even when the sensor and wiring are perfect, so verify cooling system performance before condemning electrical parts.
  • Some vehicles use a shared reference voltage for multiple sensors, and a short in another sensor on the same circuit can pull down the reference and set P0E24 along with other codes, so check for companion codes.
  • The sensor G signal may be used by the inverter's protection strategy to limit torque, so a intermittent fault can cause brief power cuts that the driver feels as a hesitation without the light staying on.
  • After any repair involving the inverter or its connectors, the control module may require a relearn or calibration procedure, and skipping it can cause the code to return even though the hardware is fixed.

Can I keep driving with P0E24?

You can usually drive the vehicle to a workshop if the only symptom is the warning light, but avoid heavy acceleration or long uphill climbs because the inverter may enter a reduced-power mode without warning. If the vehicle enters limp mode, overheats, or loses power intermittently, stop driving and arrange a tow to prevent damage to the inverter or motor.

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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