P2D94Starter/Generator Phase Z Current Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D94 completes the high-side series: the phase Z current sensor of the starter/generator outputs a value above its valid window. Inverters for 48 V starter/generators are built for three- or six-phase machines, and the controller relies on measured phase currents to set torque for engine restarts, boost and energy recovery. CARB's OBD rule requires input components, including the hybrid parts a manufacturer has to monitor, to detect wiring faults and readings outside the plausible range; a high-side code like this one is such an out-of-range finding. No manufacturer documents P2D94 publicly. Typical finds are a pinched lead or a loose plug at the machine, moisture in the electronics or a sensor defect, which often means replacing the starter/generator assembly. P2D97 is the low counterpart, P2D9A the intermittent fault.
- What you may notice
- MIL or system warning lamp
- Stop-start and recuperation switched off
- Battery warning because the machine charges less or not at all
- Likely causes
- LikelyPinched sensor lead or loose plug at the starter/generator
- PossibleWater ingress into the machine-mounted electronics
- PossiblePhase Z current sensor defective, output reads too high
- 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.