Powertrain, generic · Hybrid propulsion

P0BDB Drive Motor Inverter Temperature Sensor E Circuit

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

Which thermistor counts as inverter temperature sensor E is set by the manufacturer. In GM's hybrid tables it is the third sensor of the motor A inverter (PIM sensor #3), assigned to phase W in the 2016 to 2019 tables. P0BDB is the general circuit code for an electrical fault that is not classed as low, high or erratic. No manufacturer documents this exact code publicly; GM uses only the siblings P0BDC, P0BDD and P0BDE. CARB requires hybrid sensor circuits to be monitored for circuit faults. Without a valid reading the controller cannot protect the phase W power switches and usually limits motor torque. The sensor is built into the inverter, so the repair is often the inverter assembly.

Likely causes

Internal fault of the thermistor or its circuit inside the power inverter module

Corroded or loose connector at the inverter module

Software fault in the motor control processor

Symptoms

Malfunction indicator lamp or hybrid system warning
Reduced electric drive power
Further inverter temperature codes stored at the same time

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