P2D95Starter/Generator Phase X 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
- P2D95 means the phase X current sensor of the starter/generator delivers a signal below the lowest value the controller accepts. The machine works as motor and as generator, so its phase currents change direction and the sensor reports signed values; GM's eAssist table, for example, uses limits of minus and plus 440 A. Low therefore does not mean little current, but an implausibly large reading in the negative direction or an output that has collapsed. Likely reasons are a signal wire shorted to ground, a lost sensor supply or a broken sensor. No manufacturer documents P2D95 publicly; in the GM analogue the U-phase low code sets below -440 A as a two-trip Type B fault. P2D92 is the high side, P2DC1 the general phase X circuit fault and P2DC2 its range check.
- What you may notice
- Warning lamp after repeated detection
- Starter/generator runs in a restricted mode with less torque
- Stop-start unavailable
- Likely causes
- LikelyPhase X sensor signal wire shorted to ground or housing
- PossibleSensor supply voltage missing because of an open wire or terminal
- PossibleCurrent sensor output failed at the lower end of its range
- 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.