andrewrajcoomar

I have a Nissan Sentra 2.0 1999 car.

The Service Engine Soon light came on about 5 days ago. Had it read and the error code is P0402 - Exhaust Gas Recirculation flow Excessive Detected.

I took the car to a service center and was quoted $435 inclusive of parts and labor. They were going to replace the EGR valve, the selonoid and whatever else using a kit.

Anyway, I have a Haynes Repair Manual and went through the section that deals with testing and replacing the valve. I brought the engine up to operating temperature, put into idle and then revved to 4,000rpm with one hand on the valve. I could feel no movement. I did this several time.

Now the manual says the problem could be a close valve or an open valve. If it's an open valve, the manual explains how to remove it and clean any deposits.

How do I know if it's stuck in open or close. The car idles a little different, but not rough and I have not seen any increase in fuel consumption.

I have a quote for $70 for a replacement valve. Should I just go ahead and replace the valve? Is there more I should be looking for?

Thanks.

psuLemon

http://www.sentra.net/tech/ecu.php? go to the link, it will tell you

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andrewrajcoomar

Thanks! But not quite what I am looking for.

I do know the error code already. The Haynes manual talks about the throttle body and the solenoid valve also as possible cause for the code.

But more specifically, how do I know whether the EGR valve is stuck in closed or opened?

thecolonelcm

You said that the code was P0402 correct? By the list on Sentra.net it appears that the code you threw is different. is the code you're thinkin of: 0302 EGR function / EGR control valve does not operate???
The code 0402 is stated as Fuel temperature sensor or circuit and the remedy is to Check the component and its circuit.
Just sharin what i read. Could be just worded differently, but i felt it my duty to point out what i saw. good luck w/ the problem and let us know how it turns out.

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