Powertrain, generic (extended)

P2D2F Cold Start Turbocharger/Supercharger A Underboost

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Leak in charge air pipes, intercooler or intake manifold
Intake manifold damaged by combustion after an internal EGR cooler crack (FCA EcoDiesel recalls)
Variable turbine vanes or wastegate sticking in the cold
Engine control software that needs an update

Symptoms

  • 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

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–2,000
Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

turbocharger awastegate a

Related codes

P2D30P0299P0234P2C9BP2563

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.