P0DF1: Generator Inverter Temperature Sensor B Circuit Intermittent/Erratic

P0DF1 means the signal of generator inverter temperature sensor B drops out or jumps for short moments and then looks normal again. Typical triggers are temperature steps faster than the power module could physically heat or cool, or brief readings that resemble an open line. No manufacturer documents P0DF1 publicly: Ford's monitors for its generator inverter sensor cover only opens and shorts (P0BCE, P0BCF), and Mitsubishi has no intermittent code for the corresponding V-phase sensor at all. CARB still expects inverter thermal inputs to be monitored. Because the fault comes and goes, freeze frame data and a wiggle test of the inverter harness tell more than swapping parts. A steady fault on this sensor would be logged as P0DF0, P0DF5 or P0DF6 instead.

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 light that comes and goes
Occasional short loss of generator power
Fault often not reproducible at the workshop

Most likely causes

Loose or fretted terminal in the inverter connector
Harness chafing or vibration damage near the power unit
Intermittent contact inside the inverter module

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

Repair difficulty: hard
It can trigger limp mode.
It affects emissions.

What each character of P0DF1 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
D: Subsystem depends on the code range
F1: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0DF1?

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 P0DF1?

The most common causes are: loose or fretted terminal in the inverter connector; harness chafing or vibration damage near the power unit; intermittent contact inside the inverter module.

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.