P0E94: Drive Motor B Inverter Voltage Sensor B Circuit High

P0E94 records that voltage sensor B in the drive motor B inverter reports a value at the top of its signal range. A short from the signal to a supply, an interrupted sensor ground or a defective measuring stage are the usual explanations; a genuine overvoltage would normally show on the other channels too. No manufacturer documents P0E94 publicly. For sensor A of the rear motor Mitsubishi publishes the high limit on the 2023 Outlander PHEV: P0DA6 needs a signal of at least 4.76 V lasting 0.3 s, and only while the propulsion system is active, so the check is not run in standby. The low side of sensor B on motor B is P0E93, the high side of sensor B on motor A is P0E8F. CARB requires out-of-range checks for such inputs. Expect the second motor to be taken offline and a warning with MIL.

Symptoms

• MIL and EV system warning
• Second drive motor deactivated, less traction and power

Most likely causes

• Measuring stage for channel B in the motor B inverter defective
• Signal shorted to a supply or lost sensor ground
• Real overvoltage on the high-voltage bus

What to check, in order

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

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. 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 P0E94 means

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

Frequently asked questions

Can I keep driving with code P0E94?

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 P0E94?

The most common causes are: measuring stage for channel B in the motor B inverter defective; signal shorted to a supply or lost sensor ground; real overvoltage on the high-voltage bus.

Related codes

• P0E93Drive Motor B Inverter Voltage Sensor B Circuit Low
• P0E91Drive Motor B Inverter Voltage Sensor B Circuit
• P0E92Drive Motor B Inverter Voltage Sensor B Circuit Range/Performance
• P0DA6Drive Motor B Inverter Voltage Sensor A Circuit High
• P0E8FDrive Motor A Inverter Voltage Sensor B Circuit High

Sources

• mitsubishitechinfo.com: N503241100000700USA
• law.cornell.edu: 13 CCR 1968.2

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.