Powertrain, generic · Hybrid propulsion

P0BDF Drive Motor Inverter Temperature Sensor E Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0BDF flags an unstable signal from inverter temperature sensor E: the reading jumps or drops out briefly instead of staying out of range, typically from a loose connector, a cracked solder joint or an ageing thermistor. In GM's hybrid tables sensor E is the phase W sensor of the motor A inverter, but GM does not list this erratic code; no manufacturer documents P0BDF publicly. CARB requires hybrid sensor circuits to be checked for circuit faults, which includes intermittent signals. Unlike P0BDD and P0BDE, the value returns to plausible levels between faults, so the code may come and go. Because the controller cannot trust the sensor, it usually reduces motor power while the fault is present.

Likely causes

Loose, corroded or vibrating connector at the inverter
Cracked solder joint on the inverter sensing board
Ageing thermistor with unstable resistance

Symptoms

  • Malfunction indicator lamp that comes and goes
  • Occasional loss of electric drive power

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
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

Related codes

P0BDBP0BDCP0BDDP0BDEP0BD5P0BE4

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