I got the engine code p0401 on my 2004 Suzuki XL7, what will cause this code?
You should start by removing the EGR valve and clean the EGR ports and valve. I the problem persist you may have to replaced the EGR valve.
P0401 SUZUKI - Exhaust Gas Recirculation Flow Insufficient Detected Read more: https://www.autocodes.com/p0401_suzuki.html
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