P0A76Generator Phase W Current Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A76 signals that phase W of the hybrid generator conducts or reports too little current while the generator should be producing or absorbing torque. No manufacturer documents P0A76 publicly. Physically, the generator phase leads run from the inverter into the transaxle or engine bay, so a loose bolted terminal, a cracked lead or a corroded connector can open the W path; electrically, a sensor fixed near zero gives the same reading. A Caterpillar patent separates both: a sensor fault is assumed when one phase reads about zero while the sum of the three no longer balances. A Hyundai patent shows separate generator phase sensors in the inverter. CARB requires circuit monitoring. P0A77 is the high side, P0A70 and P0A73 phases U and V.
- What you may notice
- Hybrid warning and MIL
- Engine start harsh or delayed, charging reduced
- Likely causes
- LikelyLoose terminal, cracked lead or corroded connector in generator phase W
- PossibleGenerator phase W current sensor stuck near zero
- RareOpen phase W winding in the generator
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €300 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.