OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P2D28

Cold Start Propulsion Torque Performance

During cold start, the propulsion torque output does not match the calibrated cold-start torque profile. Cold engine response, hybrid blend, or torque modelling deviates from expected.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberD / 28

Possible causes

  • Increased cold-engine drag torque high
  • Hybrid blend strategy off-target medium

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 100–1000 €
  • Estimated time: 0.5–4 h
  • Component: ecm
  • Component: engine
  • Component: hybrid drivetrain
  • MIL / check engine light
  • emissions-relevant
  • drive cycle required

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication