P0A63Drive Motor A Phase W Current
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A63 concerns the current in phase W of drive motor A. In the Toyota field reports filed with NHTSA it always appears beside P0A60: on a 2006 Highlander Hybrid with sub code 502, after P0A60 sub code 501, together with P0A78 and P0AEF, master warning on and no drive; the inverter assembly was replaced. These Toyota reports name only V and W, for the motor and for the generator (P0A72, P0A75), which fits a design where two phase currents are measured and U follows from the rule that all three add up to zero, as a Hyundai patent describes. Audi stores P0A6300 in module J841 of the 2021-23 Q5 e quattro when the welded high-voltage phase lead fails. P0A64/P0A65 are low and high, P0A5D and P0A60 phases U and V.
- What you may notice
- Master warning or drive system fault message, MIL
- Vehicle will not move or start
- Likely causes
- LikelyInternal fault in the inverter assembly (Toyota Highlander Hybrid)
- PossibleHigh-voltage phase W cable or weld joint faulty (Audi Q5 e quattro)
- PossiblePhase W current sensor failed
- 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: €400 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.