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There are multiple causes behind a exhaust gas recirculation (EGR) related OBDII problem codes. For example the EGR on this Camry can be replaced. That may or may not correct the condition. The first steps in solving the problem are isolating the symptoms. For example a catalytic converter failure or problem (which may or may not trigger an OBD code) can cause EGR problems. Without replacing non-faulty components, the vehicle should be scanned with a professional reader-tool that can actuate the EGR to test its function. For reference purposes the EGR for the 1999 Toyota Camry with the 3.0L V6 is Standard Motor Parts/Intermotor #EGV693.
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What is computer Trouble code PO402 Nissan Frontier pick up?
PO402 code, your EGR flow is excessive. Replace it.
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P0402 Exhaust Gas Recirculation Flow Excessive Detected Cost to repair, I would not know. Depends on what is defective. EGR valve is a possibility. Sometimes cleaning the EGR valve will do the trick and it cost nothing.
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