Code Definition

P201D — Intake Manifold Runner Control Actuator Internal Fault

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P201D

P201D is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P201D is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The intake manifold runner control (IMRC) actuator opens and closes flaps in the intake manifold runners to tune airflow for low speed torque, emissions, and idle quality. The Powertrain Control Module (PCM) commands the actuator and monitors its position feedback and internal self diagnostics. DTC P201D is a generic powertrain code set when the actuator reports an internal failure, such as a motor fault, a position feedback error, or a failed internal diagnostic, so it can no longer respond correctly to commands. The driver may notice reduced low end performance, rough idle, hesitation, or an...

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