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P0406

P0406 (https://www.yourmechanic.com/article/p0406-obd-ii-trouble-code-exhaust-gas-recirculation-sensor-a-circuit-high-by-spencer-clayton) involves the EGR system but that may or may not be the only factor causing your rough running condition. Typically, P0406 will set if you have a failed EGR valve, excessive carbon buildup, an open or short in...

The code P0406 (https://www.yourmechanic.com/article/p0406-obd-ii-trouble-code-exhaust-gas-recirculation-sensor-a-circuit-high-by-spencer-clayton) is for the electronic gas recirculation valve high circuit input. Meaning the valves sensor is detecting a high voltage input. This can be due to carbon build up on the valve, a bad valve, or a...