Faulty temperature sensor G internal failure; Open or shorted wiring in the sensor circuit; Corroded or loose electrical connector at the sensor or inverter; Inverter overheating due to cooling system malfunction; Damaged or pinched wire harness; Failed inverter control module (less common)

DTC codes / P0Exx · Hybrid propulsion / P0E26

P0E26Drive Motor Inverter Temperature Sensor G Circuit High

Q: What does code P0E26 mean?

Drive Motor Inverter Temperature Sensor G Circuit High. P0E26 indicates that the drive motor inverter temperature sensor G circuit is reporting a voltage above the normal range, which the inverter controller interprets as an excessively high temperature reading or an open circuit. The computer sets this code when the sensor signal voltage exceeds the calibrated maximum for a set time, often indicating a faulty sensor, wiring issue, or actual overheating condition.

P0E26 indicates that the drive motor inverter temperature sensor G circuit is reporting a voltage above the normal range, which the inverter controller interprets as an excessively high temperature reading or an open circuit. The computer sets this code when the sensor signal voltage exceeds the calibrated maximum for a set time, often indicating a faulty sensor, wiring issue, or actual overheating condition.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light or service vehicle soon message
Reduced power output or limp mode to protect the inverter from overheating
Possible shutdown of the hybrid or electric drive system
Inconsistent or erratic temperature gauge readings if equipped
Often no symptoms besides the warning light

Common causes, most likely first

Faulty temperature sensor G internal failure
Open or shorted wiring in the sensor circuit
Corroded or loose electrical connector at the sensor or inverter
Inverter overheating due to cooling system malfunction
Damaged or pinched wire harness
Failed inverter control module (less common)

How to diagnose and fix it

Perform a visual inspection of the sensor and its wiring for obvious damage or corrosion
Check the sensor resistance and compare to specifications using a multimeter
Inspect the connector pins for tightness and clean any corrosion
Test the sensor signal circuit for continuity and short to ground or power
Verify the inverter cooling system operation (coolant level, pump function)
Replace the temperature sensor if faulty
Repair or replace damaged wiring or connectors as needed

Don't overlook cooling system faults

A common mistake is replacing the sensor when the real problem is a clogged or failing inverter coolant pump causing genuine overheating.
The code can set intermittently due to a loose connector that only loses contact during vibration or temperature swings.
Some vehicles use multiple temperature sensors in the inverter; sensor G may be a specific location that requires partial disassembly to access.
A high voltage reading does not always mean the inverter is hot; an open circuit in the sensor wiring will also drive the signal voltage high.
Always clear the code and perform a road test to confirm the repair, as the fault may not reappear immediately.

Can I keep driving with P0E26?

Driving with this code is not recommended because the inverter may overheat and cause a sudden loss of power or complete shutdown, increasing the risk of an accident. If you must drive, limit speed and distance, and avoid heavy acceleration or sustained high loads.

Tools that help

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