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Why does the engine light keep coming on indicating EGR valve in a 2000 Mazda Protege after the EGR valve and the EGR booster sensor were replaced?
Wiki User
∙ 8y ago
Either there is no Voltage or Vacume going 2 the Valve OR the Passagway under the Valve is Blocked.
Clean the EGR Line with carb cleaner to ensure not any blockage.
If you are referring to the check engine light and are still receiving a code indicating EGR valve, then the problem is that the EGR valve is being effected by the problem. The EGR valve is not the problem, it is just the component that is being effected. Code readers only tell you the effected part, not necessarily the bad part. This is one of the big problems with autozone's free diagnostics, you get what you pay for.
Wiki User
∙ 8y ago
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Why does the engine light keep coming on indicating code PO401 in a 2000 Mazda protege?
Trouble code P0401 means:Exhaust gas recirculation-insufficient flow detected
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?
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
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