Can I clean the EGR valve myself?

Yes — remove it and clean with carb cleaner and a brush. Also clean the intake port/passage.

Is P0401 common on certain cars?

Very common on Fords with the DPFE sensor. Replacing the DPFE sensor often fixes it for $30-$50.

Medium Severity

Emissions System

The EGR is not flowing enough exhaust gas. Usually carbon buildup blocking the passages.

Common Fix

Clean EGR valve and passages

Estimated Cost (DIY)

$20 - $150

Carbon buildup in EGR passageslikely

Stuck-closed EGR valvepossible

Failed EGR position sensorpossible

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Can I clean the EGR valve myself?: Yes — remove it and clean with carb cleaner and a brush. Also clean the intake port/passage.
Is P0401 common on certain cars?: Very common on Fords with the DPFE sensor. Replacing the DPFE sensor often fixes it for $30-$50.

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