P2D28Cold Start Propulsion 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
- P2D28 concerns the torque side of a cold start strategy. To heat the catalyst, the engine control asks for a torque reserve: spark is retarded and airflow raised so the wheels still get the requested torque while extra heat goes into the exhaust. A GM patent describes this, with a heat estimate turned into a reserve request that enters the propulsion torque calculation. The code means the torque delivered or commanded in this phase strayed from what the strategy planned. CARB allows cold start heating to be judged by the last commanded reserve of torque over the first 30 s at idle. Stellantis lists P2D28 for the 2026 Dodge Charger with the 3.0 l Sixpack engine; bulletin 18-022-26 says it was set falsely through a non-robust monitor and is cured by PCM software. P032F is the general low torque code.
- What you may notice
- Check engine light shortly after a cold start
- Hesitant or uneven pull while the engine is still cold
- Often no noticeable symptom when the cause is software
- Likely causes
- LikelyEngine control software with a monitor that sets the code without a real fault
- PossibleThrottle, intake leak or airflow error, so retarded spark cannot be balanced by more air
- PossibleMisfires or weak ignition while spark is heavily retarded
- RareImplausible temperature or speed input to the torque model
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.