Code Definition

P1131 — Intake maniflld air control solenoid fault

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Nissan

About P1131

P1131 is a manufacturer-specific powertrain diagnostic trouble code recorded for Nissan vehicles. 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.

P1131 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The intake manifold air control system on Nissan engines uses a vacuum operated actuator, commanded by an electric control solenoid, to open and close swirl or runner control flaps inside the intake manifold. The Engine Control Module (ECM) energises this solenoid to vary intake air velocity and charge motion across the engine speed range, improving combustion stability at low rpm and airflow at higher rpm. DTC P1131 sets when the ECM detects that the solenoid control circuit is electrically open, shorted, or drawing current outside the expected range, or when the commanded flap position is no...

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