Powertrain, generic · Hybrid propulsion

P0BD0 Generator Inverter Temperature Sensor A Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0BD0 is reserved for a generator inverter temperature sensor A signal that jumps or briefly drops out instead of failing for good. A liquid-cooled inverter changes temperature slowly, so sudden steps point to a contact problem or to interference: a Hitachi patent on inverter systems explains that the small sensor signal can pick up noise from the high-voltage main circuit and has to be filtered statistically. No manufacturer documents P0BD0 itself publicly; CARB requires hybrid sensor inputs to be checked for such faults as well. Permanent faults are reported as P0BCE or P0BCF. Freeze-frame data and a wiggle test at the inverter connector help find the cause.

Likely causes

Loose or corroded contact at the inverter connector
Intermittent fault inside the inverter assembly
Interference from the high-voltage circuit on the sensor signal

Symptoms

  • Warning lamp that comes and goes
  • Brief drops in generator or hybrid power
  • Jumping inverter temperature in live data

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

generator inverter temp sensor awiring harnesshybrid control module

Related codes

P0BCCP0BCDP0BCEP0BCFP0DF1

References: law.cornell.edu, patents.google.com.