Powertrain, generic · Hybrid propulsion

P0BDE Drive Motor Inverter Temperature Sensor E Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P0BDE means the signal of inverter temperature sensor E is above its valid range. For GM's NTC thermistor with pull-up that reads as an extremely cold phase W in the motor A inverter, typically an open circuit, lost reference ground or a failed sensor. GM sets it below -50 °C, but only after at least 90 s of inverter warm-up at 20 Nm or more, so a genuinely cold car does not trip it: 2.625 of 3.65 s, Type B, two trips, in the 2016 and 2018 tables, 6.25 of 8.75 s, Type A, in a 2019 table. The 2011 Volt uses below -58 °C (Type A), the 2012 and 2013 two-mode trucks below -40 °C (Type B). The controller usually limits power to protect the unmonitored phase.

Likely causes

Open thermistor or broken connection inside the power inverter module

Loose or corroded connector at the inverter

Lost sensor reference ground on the sensing board

Symptoms

Malfunction indicator lamp and hybrid warning
Reduced electric drive power once the inverter has warmed up

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 ewiring harnesshybrid control module

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.