Code Definition

P1400 — EGRC Solenoid Valve

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

About P1400

P1400 is a manufacturer-specific powertrain diagnostic trouble code recorded for Infiniti 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.

P1400 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

On these Nissan and Infiniti vehicles the EGRC solenoid valve, also called the EGR control solenoid valve, is an electrically operated vacuum switching valve that the Engine Control Module (ECM) uses to apply or cut manifold vacuum to the EGR valve. DTC P1400 is set when the ECM detects an improper voltage in the EGRC solenoid valve control circuit, which indicates an open circuit, a short circuit or a failed solenoid winding rather than a flow problem. Because this is an electrical circuit fault, the EGR valve may not receive its vacuum signal correctly, leading to incorrect exhaust gas recir...

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