P0E93: Drive Motor B Inverter Voltage Sensor B Circuit Low

With P0E93 the controller sees the B voltage channel in the motor B inverter stuck near the bottom of its signal range, as happens with a short to ground, an open signal path or a failed measuring circuit. No manufacturer documents P0E93 publicly. Mitsubishi's rear motor sensor A on the 2023 Outlander PHEV gives a comparable limit: its low code P0DA5 sets once the signal sits at or below 0.55 V for 0.3 s with the rear motor unit powered at 8 V or more, and the checks start with the battery management and the high-voltage cables to the rear motor before the motor unit itself. Drive motor A has the equivalent sensor B fault as P0E8E. If several channels read low together, missing high voltage is more likely than a sensor fault. Motor B is normally disabled until the reading is valid.

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

MIL and EV system warning
Rear or second motor without power, front-drive only

Most likely causes

Measuring circuit for channel B in the motor B inverter failed
Signal line shorted to ground or open
High-voltage cable or connection to motor B open, no voltage at the inverter

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
With the connector unplugged, check whether the signal wire is making contact with ground.
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 P0E93 means

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

Frequently asked questions

Can I keep driving with code P0E93?

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 P0E93?

The most common causes are: measuring circuit for channel B in the motor B inverter failed; signal line shorted to ground or open; high-voltage cable or connection to motor B open, no voltage at the inverter.

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.