OBD-II code · Powertrain (generic)
P0E91 Drive Motor A Inverter Voltage Sensor B Circuit Low
The ECM detects a low fault on the drive motor a inverter voltage sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0E91?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Drive Motor A Inverter Voltage Sensor B, Wiring Harness, Hybrid Control Module
Related codes
- P0D2FDrive Motor A Inverter Voltage Sensor A Circuit Low
- P0DA5Drive Motor B Inverter Voltage Sensor A Circuit Low
- P0E96Drive Motor B Inverter Voltage Sensor B Circuit Low
- P0E8EBattery Charger B Current Sensor Circuit Intermittent/Erratic
- P0E8FDrive Motor A Inverter Voltage Sensor B Circuit
- P0E90Drive Motor A Inverter Voltage Sensor B Circuit Range/Performance
- P0E92Drive Motor A Inverter Voltage Sensor B Circuit High
- P0E93Drive Motor A Inverter Voltage Sensor B Circuit Intermittent/Erratic
- P0E94Drive Motor B Inverter Voltage Sensor B Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.