P0A61Drive Motor A Phase V 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
- P0A61 indicates that phase V of drive motor A carries, or reports, too little current when it should be near its peak, pointing to an open phase V circuit. GM uses the same peak-axis test as for phase U on the 2016 Chevrolet Volt motor control processor and in its 2018 hybrid tables, here with the rotor within 30 degrees of the V phase axis: inverter above 50 V in normal PWM, squared current command above 900 A2 in 2016 and 4,900 A2 from 2018, a peak phase current under 9 A for 0.4 s within 0.6 s, Type A with MIL on the first trip. On inverters that sense only two phases a dead V sensor also corrupts the calculated third phase. A Caterpillar patent detects such a sensor by a near-zero phase reading. P0A62 is the high side, P0A5E and P0A64 cover U and W.
- What you may notice
- MIL and propulsion system warning
- Jerky or weak electric drive
- Likely causes
- LikelyOpen circuit in the phase V cable, connector or terminal
- PossiblePhase V current sensor reads zero
- PossiblePhase V switch of the inverter not conducting
- RareOpen winding of phase V in 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: €300 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.