I have done everything to get rid of the PO401 Code on my 2005 Buick LaCrosse. I changed the MAP ensor, PCV valve, EGR valve and cleaned the throttle body. What else do you recommend?

Asked by Jul 29, 2017 at 10:00 AM about the 2005 Buick LaCrosse CXL FWD

Question type: Maintenance & Repair

1 Answer

57,735

https://www.yourmechanic.com/article/p0401-obd-ii-trouble-code- exhaust-gas-recirculation-flow-malfunction-by-jay-safford

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