What's the 40e9 BMW fault code?

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Ryan S. December 15, 2020
The fault code 40e9 will be indicated on the BMW and it will mean that there is a problem with the exhaust-gas recirculation controller. To find the diagnostic codes You will need an OBD diagnostic tool that You will connect to the OBD port. The port is located inside the vehicle in the instrument panel located under the dashboard in the driver's side footwell. The exhaust gas recirculation is a way that exhauSTSystems will control the Nitrous emission in diesel engines. The EGR will do this by lowering the oxygen concentration inside the combustion chamber. The EGR valve if needing to be replaced will cost approximately $30 - $60 depending on if it's an OEM or aftermarket part.
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Pearline S July 30, 2020
If your BMW throws a 40E9 code it means there is a an issue withe the exhaust-gas recirculation controller or position control.
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Han Min July 23, 2022
I have bmw error 40e9
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