DTC code P0401: EGR flow insufficient
P0401 shows up when the exhaust gas recirculation system isn’t sending enough exhaust back into the intake. That process keeps combustion temperatures and emissions in check. Carbon buildup blocking the EGR valve is the leading cause. Rough idle, hesitation, and knocking under load are the usual signs.
Intangles can schedule EGR cleaning based on mileage or engine hours, catching the carbon buildup before it ever sets off the code. Want to see how? Share your email to get started.
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