Powertrain, generic (extended)

P2AB6 Cold Start Intake Manifold Runner Control Stuck Closed Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2AB6 reports the runner flaps of bank 2 held in the closed position during the cold-start phase, against a command to open them. Like its siblings it exists only on engines that control each bank's runners separately and only becomes testable after a soak of six hours or more at ambient temperatures from -6.7 °C upward, as defined in CARB's cold-start rules. No manufacturer documents P2AB6 publicly. Ford's gasoline summary for 2020 to 2023 lists the everyday equivalent as P2007 and treats plates that miss the commanded position or overrun their travel as a functional fault. Because only one bank is restricted, the engine may run slightly unevenly between the banks until the flaps free up or the strategy ends. If P2AB5 is set as well, suspect a shared actuator supply. P2AB4 is the open-stuck case on this bank.

Likely causes

Bank 2 flaps seized by deposits or ice
Bank 2 actuator or its control valve defective
Shared actuator supply or vacuum source weak (often with P2AB5)

Symptoms

  • Check engine light on
  • Slightly uneven running and reduced pull after a cold start
  • Higher cold-start emissions

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
Time0.5–5 h

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

Parts involved

imrc actuator b2intake manifold runners

Related codes

P2AB5P2AB4P2AB3P2007P2005

References: law.cornell.edu, fordservicecontent.com.