What it means
Generator phase V current is above the expected range. The code identifies a high-current condition but does not establish its cause.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The hybrid control system monitors generator phase V current as the inverter controls the generator. This code sets when phase V current exceeds the expected range; a short between phases or a stalled rotor can cause the excess current.
Common causes
Most likely first.
- Short between motor phases
- Rotor stalled - high stall current
Symptoms
- Check-engine or hybrid-system warning light
- Reduced hybrid performance
- Possible reduced-power mode
How to diagnose it
- Record freeze-frame data and compare live phase V current with phases U and W to see whether the high reading occurs continuously or under particular conditions.
- Check for related generator or inverter codes and note any reported rotor stall or reduced-power events.
- With high-voltage safety procedures followed, inspect phase V wiring and generator and inverter connectors for damaged insulation, cross-phase shorts, or heat damage.
- Have a qualified technician measure generator phase-to-phase and phase-to-ground insulation and winding condition against the manufacturer's specification.
- If the phase wiring and winding pass, check for a mechanically stalled generator rotor and compare phase current-sensor readings.
Common fixes
- Repair shorted or heat-damaged phase V wiring and connector terminals.
- Repair or replace a generator winding confirmed shorted between phases or to ground.
- Correct a confirmed mechanical cause of generator rotor stall.
- Repair the inverter if testing confirms its switching or current measurement circuitry is at fault.
Can I keep driving?
Do not drive if the vehicle loses power, stalls, or displays a stop warning; the fault can cause reduced-power operation or shutdown. Keep clear of high-voltage components and arrange prompt diagnosis.
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.