P2D3DCold Start Hybrid/EV Drive Motor Inverter Torque Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D3D narrows the cold start check to the inverter: during the cold start strategy, the torque it produced through the drive motor did not match the torque the hybrid controller commanded. Precise torque matters in this phase because motor and engine share the work. In Toyota application WO2015092509A1 the engine idles with retarded ignition at roughly zero to 3 kW while the second motor supplies most of the drive torque; in GM patent US8838316B2 the motor must cut its torque at the moment the engine fires so the driver feels no jolt at the wheels. No manufacturer documents P2D3D publicly. CARB asks for cold start faults to be stored apart from ordinary ones, which is why P0A78 exists beside this code. Typical reasons are inverter current sensing, temperature derating or calibration; expect a MIL rather than a loss of drive.
- What you may notice
- Malfunction indicator lamp on
- Slight jerk when the engine fires after a cold start
- Likely causes
- LikelyPhase current sensing error in the inverter distorting the delivered torque
- PossibleTorque derating because of very low or high power electronics temperature
- PossibleTorque coordination of the cold start strategy in software
- 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: €100 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.