what does the code p0402 exhaust gas recirculation flow excessive mean

Asked by Nov 20, 2013 at 09:15 PM about the 1999 Mazda MX-5 Miata Base

Question type: Maintenance & Repair

2 Answers

26,355

it means there is more than the desired amount of exhaust gas being recirculated. perhaps the valve is partially stuck open causing the issue. sometimes the springs get weak and the vacuum going to it will hold it open and cause the code also.

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replace your egr (exhaust gas recirculation) valve.

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