P201C Intake Manifold Runner Control Actuator Supply Voltage Low (Bank 2)

P201C reports that the electric flap actuator of bank 2 is not getting enough supply voltage. It only makes sense on V engines that give each bank its own powered actuator. No manufacturer documents P201C publicly. The bank 1 counterpart P201B is described by GM for its DC-motor swirl drive: the driver supply below 6 V while the relay feed is above 11 V, in 240 of 300 samples, Type B. That logic separates a weak battery, which would also pull the relay feed down, from a loss on the branch to the actuator. CARB treats such actuators as comprehensive output components and requires circuit faults to be found continuously. In practice the search starts at the fuse and supply pin of the bank 2 actuator. If both banks report a supply fault at once, look for a shared fuse or relay first.

Likely causes

Symptoms

• Malfunction indicator lamp on
• Bank 2 flaps stop working

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.