What it means
The control module detected a fault associated with generator phase V current. The code alone does not identify whether the cause is in the current measurement circuit, inverter, or generator.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The hybrid control module monitors generator phase V current through the inverter's current-measurement system. This code identifies a fault associated with the phase V reading, but does not determine whether the cause is the sensor, wiring, inverter, or generator.
Common causes
Most likely first.
- Phase current sensor failed
- Wiring fault
Symptoms
- Check-engine or hybrid-system warning light
- Reduced hybrid performance
- Possible reduced-power mode
How to diagnose it
- Save freeze-frame data and compare live generator phase V current with phases U and W to see whether the reading is absent, unstable, or out of balance.
- Check for related generator, inverter, or current-sensor codes and note whether reduced performance occurs at the same time.
- With high-voltage safety procedures followed, inspect the phase V harness and generator and inverter connectors for loose terminals, corrosion, chafing, or heat damage.
- Test the phase V current-sensor circuit for opens, shorts, and poor connections using the manufacturer's diagnostic information.
- If the sensor wiring is sound, have the inverter phase V output and generator phase V winding tested against the manufacturer's specification.
Common fixes
- Secure or repair a loose, corroded, or damaged phase V connector.
- Repair an open or short in the phase V current-sensor wiring.
- Replace the phase V current sensor if testing confirms it has failed.
- Repair or replace the inverter or generator only after tests identify an internal fault.
Can I keep driving?
Limit driving and arrange prompt diagnosis because hybrid performance may be reduced or the vehicle may enter reduced-power mode. Stop if propulsion is affected or a warning directs you to stop, and do not handle high-voltage components.
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.