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Causes and Fixes P0401 Code: Exhaust Gas Recirculation Flow Insufficient Detected
How to fix a P0401 engine code: Exhaust Gas Recirculation Flow Insufficient Detected What is the EGR Valve? The EGR valve reduces emissions by allowing burnt exhaust gases to go back into the engine. This lowers the engine combustion temperature, which reduces Nitrogen Oxide (NOx) emissions. An EGR valve can be vacuum-controlled and ...
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