Question about 2002 Mitsubishi Galant

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Service engine light is on the code comes up erg insuficiant flow

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That would be EGR. (Exhaust Gas Recirc). It is the diaphram valve that allows exhaust gases back into the intake to be reburned. Follow the small metal tube from your exhaust manifold(s) - they will lead to a flat, circular piece. that's the EGR valve. Some (not me) have had luck simply cleaning it - I always buy a new one. (not too expensive). But before you do that, make sure it's not just the vacuum line that is assigned to operate it. If that has a leak, it won't open either.

Posted on Jul 29, 2010

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Posted on Jan 02, 2017

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Hi my fault code is p0401,egr insuficient flow detected.light come on about every 2 days& wont go off unless use a scan tool.have fitted a new egr valve but still comes on ,any ideas howard


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