P0A5FDrive Motor A Phase U Current High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A5F reports excessive current in phase U of drive motor A, a condition the inverter treats as overcurrent. Hyundai documents it on the 2017 Ioniq Hybrid (bulletin 17-01-057-1, campaign T2J): coolant leaking inside the traction motor set the Check Engine and hybrid lights with P0A5F, P0A62 or P0A65, often together with the isolation fault P0AA6; drivers noticed weak acceleration and a dead air conditioner. The procedure runs an insulation breakdown test with the scan tool and replaces the motor if it fails. A Hyundai patent shows such inverters measure two phases and calculate the third. P0A5E is the low side, P0A5D the general U code, P0A62 and P0A65 the same overcurrent on V and W.
- What you may notice
- Check Engine and hybrid warning lights
- Reduced power when accelerating
- Air conditioning inoperative (Hyundai Ioniq Hybrid)
- Likely causes
- LikelyInternal coolant leak in the traction motor causing insulation breakdown (Hyundai Ioniq Hybrid)
- PossibleShorted winding or phase lead of drive motor A
- PossibleInverter power stage fault in phase U
- RareCurrent sensor falsely reporting overcurrent
- 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: €500 – €7,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.