• P0400 Exhaust Gas Recirculation (EGR)
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    P0400 Exhaust Gas Recirculation (EGR)

    Exhaust Gas Recirculation (EGR) is an emissions control technology employed in internal combustion engines to reduce nitrogen oxide (NOx) emissions. It works by redirecting a portion of the engine’s exhaust gases back into the combustion chamber. By introducing exhaust gases, which have a lower oxygen content than fresh air, into the combustion process, the peak

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