P0BD0: Generator Inverter Temperature Sensor A Circuit Intermittent/Erratic

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.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Gently move the wiring with the engine running and watch whether the reading changes.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

It can trigger limp mode.
It affects emissions.

What each character of P0BD0 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
B: Subsystem depends on the code range
D0: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0BD0?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0BD0?

The most common causes are: loose or corroded contact at the inverter connector; intermittent fault inside the inverter assembly; interference from the high-voltage circuit on the sensor signal.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.