Powertrain, generic · Hybrid propulsion

P0BD6 Drive Motor Inverter Temperature Sensor D Circuit

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

Sensor D is, in GM's hybrid tables, the second thermistor of the motor B inverter, the counterpart of sensor C in the motor A inverter: phase V in the 2016 to 2019 tables, temperature sensor 2 of inverter B on the Volt. Other makers assign the letter differently. P0BD6 is its general circuit code for an electrical fault that the controller does not narrow down to low, high or erratic. No manufacturer documents this exact code publicly; GM reports P0BD7, P0BD8 and P0BD9 instead. CARB requires monitoring of hybrid sensor circuits. Without a valid value the controller cannot protect that inverter and usually limits the motor it drives. Read all stored codes, since several inverter codes often appear together.

Likely causes

Internal fault of the sensor inside the power inverter module

Corroded or loose connector at the inverter module

Software fault in the motor control processor

Symptoms

Hybrid system warning or check engine lamp
Reduced electric drive or generator power
Higher fuel consumption in hybrid operation

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–4,000

Time1–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

drive motor inverter temp sensor dwiring harnesshybrid control module

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com.