Rick's Free Auto Repair Advice

Posts Tagged: Exhaust Gas Recirculation A Circuit High

P0406

P0406 Exhaust Gas Recirculation (EGR) A Circuit High If you have a P0406 Exhaust Gas Recirculation (EGR) A Circuit High trouble code, read this to understand what it means. Engines recirculate a small amount of exhaust back into the intake manifold to reduce combustion temperatures and lower smog causing oxides of nitrogen emissions. The computer commands the EGR valve to open a certain amount and then checks to make sure it’s operating properly. One way to check is to mount a position sensor on the shaft of the EGR valve … Read More


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