P0A5DDrive Motor A Phase U 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
- P0A5D concerns the current in phase U of drive motor A, as seen by the inverter. Audi documents it on the 2021-23 Q5 e quattro (bulletin 2069917/1): P0A5D00, often with P0A6000 and P0A6300, is stored in the electric drive control module J841, the cluster reads Drive system: fault and the car may not start or drive. The cause was variance in welding the high-voltage phase conductors; the fix is a resistance and wiggle test of each phase lead and a new motor harness. Many inverters do not measure U at all: a Hyundai patent measures two phases and calculates the third from the zero-sum rule, so a U fault can also stem from the V or W sensor. P0A5E/P0A5F are the low and high variants, P0A60 and P0A63 phases V and W.
- What you may notice
- Drive system fault message and MIL
- Vehicle does not start or the drive system cannot be activated
- Likely causes
- LikelyHigh-voltage phase cable or weld joint to drive motor A faulty (Audi Q5 e quattro)
- PossiblePhase current sensor in the inverter failed
- PossibleInternal inverter fault
- RareWinding fault in phase U of drive motor A
- 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.