P2D2FCold Start Turbocharger/Supercharger A Underboost
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D2F means boost from turbocharger or supercharger A stayed below its target during the cold start strategy; P0299 is the same complaint in normal operation. CARB counts electronic wastegate position on petrol engines and variable turbine geometry on diesels among the features that must follow their cold start command. Stellantis uses the code on the 3.0 l EcoDiesel. Recalls 19V-757 (Ram 1500 2014-2016) and 20V-699 (Grand Cherokee 2014-2019) deal with EGR coolers that crack inside; the coolant vapour can ignite in the intake, and if P0299 or P2D2F is stored the intake manifold must be pressure tested and replaced when perforated. For the 2022 Ram 1500 EcoDiesel, bulletin 18-133-22 lists P2D2F among codes fixed by PCM software. Leaks in charge piping or a sticking turbine vane are other causes.
- What you may notice
- Weak pulling power shortly after a cold start
- Check engine light, sometimes together with P0299
- Hissing noise under load if the charge air path leaks
- Likely causes
- LikelyLeak in charge air pipes, intercooler or intake manifold
- PossibleIntake manifold damaged by combustion after an internal EGR cooler crack (FCA EcoDiesel recalls)
- PossibleVariable turbine vanes or wastegate sticking in the cold
- PossibleEngine control software that needs an update
- 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: €100 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.