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What do the codes po401 and po402 mean on a 1997 Ford explorer?
Wiki User
∙ 15y ago
P0401 - EGR flow insufficient , P0402 EGR flow excessive
Wiki User
∙ 15y ago
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What does code p402 mean on a 1997 ford explorer?
Trouble code PO402 is a generic (all car makes) code meaning "Exhaust Gas Recirculation- Excessive Detected". It means that the computer detected an abnormal or unexpectedly high rate of air flow in the exhaust gas recirculation emissions system.
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