Powertrain, generic (extended)

P2D2D Cold Start Intake Manifold Runner Performance Bank 1

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2D2D reports that the intake manifold runner or swirl flaps of bank 1 did not reach the position the cold start strategy asked for. Many engines hold these flaps in a special setting after a cold start to stir the charge and stabilise combustion while the catalyst warms up. CARB names intake runner, charge motion and swirl valves among the features that must respond to their cold start command, robustly and beyond what they would do without the strategy. The outside-cold-start counterpart is P200A. Stellantis uses P2D2D on the 2020 Ram 1500 with the 3.0 l EcoDiesel Gen 3 and eight-speed automatic: bulletins 18-008-21 and 18-002-23 list it with P2D2E and remedy it with new PCM software. Beyond software, a stiff flap shaft, a carbon-coated runner or a weak actuator are typical reasons.

Likely causes

Engine control software that judges the cold start flap check too strictly

Flap shaft or runner coated with soot and oil deposits, stiff when cold

Worn actuator or loose linkage on bank 1

Position sensor signal or wiring fault

Symptoms

Check engine light, usually without a noticeable driving change
Slightly rougher idle in the first minutes after a cold start
P2D2E or P200A may be stored too

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€80–1,000

Time0.5–4 h

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

Parts involved

imrc actuator b1intake manifold runners

Related codes

P2D2E P200A P2004 P2008 P2015

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