Powertrain, generic · Hybrid propulsion

P0BD7 Drive Motor Inverter Temperature Sensor D Circuit Range/Performance

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

P0BD7 is the plausibility check for inverter temperature sensor D, GM's second sensor in the motor B inverter. After a cold soak its reading is compared with an average vehicle temperature; more than 20 °C apart sets the code, Type B, two trips, on the 2016 Volt and Type A in a 2019 table. The 2011 Volt compares with power electronics coolant and transmission temperature after 6 h off (20 °C, Type A); GM's 2012 and 2013 tables use 15 °C after 360 min, two trips. GM bulletin PIC6303A lists P0BD7 with the other inverter thermistor codes on 2016-18 Volt, Malibu, LaCrosse and Regal: alone it causes no noticeable effect, and the inverter is replaced only if P0AC4 set at the same time.

Likely causes

Inverter temperature sensor D drifting out of tolerance

Failing power inverter module

Uneven inverter coolant flow after soak

Symptoms

Malfunction indicator lamp, often after two trips
Often no noticeable drivability change
Further inverter temperature codes may be stored

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€100–4,000

Time0.5–6 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: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.