p0401
Moderate
Ford · SUVs
Exhaust Gas Recirculation (EGR) Flow Insufficient
Quick Answer
Error code P0401 on your Ford SUVs means: Exhaust Gas Recirculation (EGR) Flow Insufficient. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
BRNCOBRNCSEDGEESCPEEXPDNEXPLREXPLRHBronco Badlands 2024Bronco Base 2024Bronco Big Bend 2024Bronco Raptor 2024Bronco Sport Badlands 2024Bronco Sport Base 2024Bronco Sport Big Bend 2024Bronco Wildtrak 2024Escape Active 2024Escape Platinum 2024Escape ST-Line 2024Expedition King Ranch 2024Expedition Limited 2024Expedition Platinum 2024Expedition XLT 2024Explorer Base 2024Explorer Limited 2024Explorer Platinum 2024Explorer ST 2024Explorer XLT 2024MACHE
Likely Causes
How to Fix It
1
Remove and inspect EGR valve for carbon buildup; clean or replace
2
Inspect DPFE sensor hoses for cracks, blockages, or deterioration
3
Test DPFE sensor voltage output with a multimeter
4
Clean EGR passages in the intake manifold if clogged
5
Verify EGR vacuum solenoid opens when commanded
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
EGR valve
DPFE sensor
DPFE hoses
EGR gasket
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