P201E Intake Manifold Runner Control Actuator Internal Performance (Bank 2)

P201E says the electronic flap actuator serving bank 2 has detected or caused an internal malfunction; the wires to it are not the issue. No manufacturer documents P201E publicly, and only engines with a separate smart actuator per bank can set it. On bank 1 GM lists the matching code P201D for its 2017–2018 diesels inside the group of faults that disable swirl control, but without its own thresholds, so even there the actuator decides what counts as internal. CARB asks for a functional check of every valve or flap system that alters charge motion. If P201E appears together with low supply (P201C) or circuit codes for bank 2, those come first; on its own it usually means the actuator, or a manifold with built-in actuator, must be replaced. Expect the bank 2 flaps to stay parked until the fault is gone.

Likely causes

Symptoms

• Malfunction indicator lamp on
• Little or no change in drivability

Repair estimate

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

Parts involved

Related codes

References: law.cornell.edu, gsi.ext.gm.com.