P2D96Starter/Generator Phase Y Current Sensor Circuit 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
- P2D96 covers the phase Y current sensor of the starter/generator when its signal drops below the valid range, for instance through a short to ground or a missing sensor supply. For the driver the more important part is how the controller reacts: without a trustworthy phase current it will usually limit or stop electric assist, stop-start can be suspended and charging through the machine may fall back, with a warning lamp. In GM's eAssist analogue the switch to sensorless current control happens within about 0.19 s, and the code is stored as Type B over two trips. No manufacturer documents P2D96 publicly. Check sensor supply and ground at the machine first. P2D93 is the high fault of Y; the series goes on with P2D97 for phase Z low, and P2D99 is the intermittent Y fault.
- What you may notice
- Electric assist reduced or switched off
- Stop-start suspended
- Battery or system warning, charging may be reduced
- Likely causes
- LikelyPhase Y sensor signal pulled to ground by damaged insulation
- PossibleOpen circuit in the sensor supply or a backed-out terminal
- PossiblePhase Y current sensor defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.