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Posts Tagged: Exhaust Gas Recirculation A Circuit Low

P0405 code for EGR — What it means and how to fix it

Learn what a P0405 code for EGR means and how to fix the problem A P0405 code is defined as Exhaust Gas Recirculation (EGR) A Circuit Low; meaning that EGR Valve Position Sensor is giving low voltage readings that are usually below the .5 – 1.0 voltage range. It’s a generic code that indicates that the engine control module (ECM) has detected that the exhaust gas recirculation (EGR) sensor has gone below the specified range. The EGR system is responsible for diverting a certain amount of exhaust gas to the … Read More


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