What it means
The current sensor for drive motor A phase V reports a circuit fault. Phase current measurement is unreliable.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The inverter regulates drive motor A by controlling current through its motor phases. The phase V current sensor measures one of those currents for the control module. This code indicates a circuit fault in the phase V sensor circuit, so its current measurement cannot be relied on for motor control.
Common causes
Most likely first.
- Current sensor failed
- Wiring fault
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Record freeze-frame data and scan for related drive motor A or inverter codes to determine whether the fault is isolated to phase V.
- Compare live drive motor A phase V current with phases U and W under similar operating conditions for a missing or implausible reading.
- With the vehicle powered down using the manufacturer’s high-voltage safety procedure, inspect accessible phase V sensor wiring and connectors for damage, looseness, or corrosion.
- Have a qualified technician test the phase V current sensor circuit and connections using the manufacturer’s wiring information and specification.
- If the wiring and connector test correctly, test the phase V current sensor itself against the manufacturer’s specification.
Common fixes
- Repair damaged, loose, or corroded phase V sensor wiring and connector terminals.
- Restore secure electrical connections at the phase V current sensor.
- Replace the phase V current sensor if testing confirms it has failed.
- Clear the code and verify phase V current data during the prescribed system check.
Can I keep driving?
Limit driving because unreliable phase V feedback can cause reduced motor torque, limp mode, or shutdown. Avoid high-load journeys and stop safely if power becomes unpredictable.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.