Drive Motor A Inverter Voltage Sensor Circuit High
What it means
The module that controls the drive motor inverter reports the inverter voltage sensor signal is too high. This may be a real overvoltage or a faulty reading.
Can I keep driving? Caution: this is a high-voltage drive system fault. Power may be reduced or the car may shut down, so get it checked soon.
What this part does
The drive motor inverter voltage sensor measures the high-voltage level supplied to the inverter that powers the electric drive motor. The motor control module uses the reading to regulate motor output and to protect the electronics from over- or under-voltage. Work on high-voltage parts is for trained people only. When it fails, you may see a warning light or reduced power.
Common symptoms
What you'll notice
- Hybrid or EV warning light on
- Reduced power or limp mode
- Car will not go into Ready
- Sudden loss of drive
Common causes
Most likely first
- Wiring or connector fault at the inverter voltage sensor (short to power)
- Faulty voltage sensor
- Real overvoltage from the battery or inverter
- Inverter control module fault
How to diagnose & fix
Work through it in order
- Read all hybrid/EV codes and note any battery or inverter codes.
- Check the 12 V battery and ground.
- Compare live inverter voltage with battery pack voltage if the scanner shows both.
- Inspect the sensor connector and wiring where accessible.
- Leave inverter work to a high-voltage technician.
Related codes
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