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Why does the engine light keep coming on indicating code PO402 excessive EGR flow detected in a 2000 Mazda protege after the egr valve and EGR booster sensor were replaced?
Wiki User
∙ 16y ago
The answer posted previously seems to be taken verbatim from this site, and probably copyrighted there:
Mazda EGR Flow: Low or Excessive?
http://www.asashop.org/autoinc/sept2002/techtips.cfm
and if that doesn't work, there are additional tips here:
P0402 EGR code Help - Automotive Message Forums
http://www.automotivehelper.com/topic478910.htm
Wiki User
∙ 16y ago
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