Question about 2004 Mazda Tribute
Was getting a 401 code was told it was egr valve replaced it.still got code so was egr booster replaced it.code changed to 402.this site told me to check air filtewr good advice has been 50,000 miles did that same code 402.have sent emails but no advise.any help thanks
A code P0402 most likely means one or more things has happened. The DPFE (differential pressure) sensor is faulty and needs to be replaced, there is a blockage in the EGR (most likely carbon buildup) or the EGR valve may not be opening due to a lack of vaccuum.
Posted on Jan 15, 2009
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Posted on Jan 02, 2017
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