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Causes and Fixes P0400 Code: Exhaust Gas Recirculation (EGR) Flow Malfunction
How to fix P0400 Code: Exhaust Gas Recirculation (EGR) Flow Malfunction A P0400 code is set when the computer (PCM/ECM) detects the flow of exhaust gas recirculation is lower than expected. The EGR valve reduces emissions by allowing burnt exhaust gases to go back into the engine. This lowers the engine combustion temperature, which reduces ...
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