Faulty temperature sensor D inside the inverter assembly; Damaged or corroded wiring harness or connector at the inverter; Open or short circuit in the sensor signal or ground circuit; Poor electrical connection at the control module; Internal failure of the inverter control module affecting sensor readings; Coolant flow issues causing actual overheating that triggers the sensor circuit fault

DTC codes / P0Bxx · Hybrid propulsion / P0BD6

P0BD6Drive Motor Inverter Temperature Sensor D Circuit

Q: What does code P0BD6 mean?

Drive Motor Inverter Temperature Sensor D Circuit. P0BD6 indicates that the powertrain control module has detected an abnormal condition in the temperature sensor circuit for phase D of the drive motor inverter, which is responsible for converting DC power to AC for the electric motor. The computer monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or behaves erratically.

P0BD6 indicates that the powertrain control module has detected an abnormal condition in the temperature sensor circuit for phase D of the drive motor inverter, which is responsible for converting DC power to AC for the electric motor. The computer monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or behaves erratically.

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
Reduced power output or limp mode due to inverter protection strategy
Inconsistent or erratic temperature gauge readings for the inverter
Possible overheating warning if the sensor underreports temperature
Often no symptoms besides the warning light, especially if the fault is intermittent

Common causes, most likely first

Faulty temperature sensor D inside the inverter assembly
Damaged or corroded wiring harness or connector at the inverter
Open or short circuit in the sensor signal or ground circuit
Poor electrical connection at the control module
Internal failure of the inverter control module affecting sensor readings
Coolant flow issues causing actual overheating that triggers the sensor circuit fault

How to diagnose and fix it

Use a scan tool to verify the code and check live data for the inverter temperature sensor D reading
Inspect the sensor connector and wiring for signs of corrosion, damage, or loose pins
Measure resistance and voltage on the sensor circuit according to manufacturer specifications
Check for technical service bulletins or software updates related to the inverter temperature sensor
Replace the faulty temperature sensor or sensor harness as needed
If the sensor is integrated into the inverter, follow the manufacturer's procedure for replacement or repair
Clear the code and perform a road test to confirm the repair

Before you replace the inverter assembly

A common misdiagnosis is replacing the entire inverter when only the temperature sensor or its wiring is faulty, so always test the circuit first.
Intermittent codes often stem from chafed wires near the inverter mounting points or heat-damaged insulation, which can be missed during a visual inspection.
The sensor may be part of a multi-sensor array, and a failure in one channel can affect readings for others, so check all related temperature sensors.
Coolant leaks or air pockets in the inverter cooling system can cause localized overheating that triggers the sensor circuit code without a sensor failure.
Some vehicles require a relearn or calibration procedure after sensor replacement, and skipping it can cause the code to return.

Can I keep driving with P0BD6?

If the vehicle drives normally and the only symptom is the warning light, you can drive cautiously to a repair shop, but avoid heavy acceleration or long trips. If the vehicle enters limp mode or shows overheating warnings, stop driving and seek professional diagnosis immediately.

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.