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What the P0402 code means. P0402 is an OBD-II generic code that the engine control module (ECM) has detected indicating the engine exhaust gas recirculation (EGR) valve is flowing too much recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold. What causes the P0402 code?
Symptoms of the P0402 Code. Check engine light is illuminating; Engine surging on idle; Poor engine performance; Engine stalling; Hard to start the vehicle; Failed emission test; Read More: EGR System Symptoms and Causes. How to Diagnose the P0402 Code. Follow the following steps to diagnose the P0402 ode:
Jun 22, 2020 · Possible Causes. NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. EGR volume control valve stuck open. Faulty EGR volume control valve. EGR solenoid valve harness is open or shorted.
P0402 is an OBD-II code that lights up when the ECM, or Engine Control Module, senses that there is a problem with the EGR (Exhaust Gas Recirculation) valve. Usually, it means that the valve could be malfunctioning and allowing too much exhaust gas to recirculate through the engine and intake manifold.
Jul 15, 2016 · What Does Code P0402 Mean? A malfunctioning EGR system will cause several codes such as P0400 or P0401-P0409 to be displayed. Often a P040x code is caused by a blockage in the EGR system and is not caused by a failed component.
Jan 22, 2024 · The P0402 code indicates excessive exhaust gas recirculation (EGR) flow. Possible causes include a malfunctioning EGR valve, blockage in the EGR system, or excessive back pressure. Symptoms may include a rough running engine, Check Engine Light illumination, or emission test failure.
Jun 14, 2020 · Code P0402 Description. Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Depending on the engine and driving conditions, the ECΜ will control the EGR Solenoid which will operate the EGR Vacuum ...
