Autozone told me it was something with the exhaust!!! I had an exhaust leak by the Mid pipe (the gasket melted!!!). I had a new gasket put in but I got the code afterwards!! Any ideas? Suggestions?

 

Here are some ideas and suggestions from the Nissan Service Manual (1998) pg. EC-256

Diagnostic Trouble:
Code No. P0400
0302


Malfunction is detected when ...

The exhaust gas recirculation (EGR) flow is excessively
low ...


Check Items (Possible Cause):

* EGR valve stuck closed (see below)
* EGRC-BPT valve leaks
* Vacuum hose to EGR valve clogged, cracked or improper connection.
* EGRC-solenoid valve not operating
* Tube leaking for EGR valve
* EGR temperature sensor defective
* Exhaust gas leak (Check exhaust pipes and muffler for leaks)

Overall Function Check:

Start engine and warm it up to normal operating temperature. Check the EGR valve lifting when revving engine up to 3,000 rpm quickly under no load. EGR valve should lift up and down without sticking.

 

Clean out your EGR passages. They are carbon clogged and you are getting the low flow code.

 

[QUOTE=90EightSE]Here are some ideas and suggestions from the Nissan Service Manual (1998) pg. EC-256

Diagnostic Trouble:
Code No. P0400
0302
...........

Thanks for all the suggestions!!! Where is the EGR Valve and what does it look like?

 

It is located below the flexible portion of the air intake (the ribbed portion) on the firewall side. Straight back from the Engine coolant temperature sensor.

Image: http://www.car-stuff.com/nissanegrvalve.htm (no, I don't work for them).

Illustration: http://z.about.com/d/autorepair/1/0/t/9/41857730.gif (same drawing in my factory manual even though it is referenced for a Stanza in the example and I don't work for these guys either).

Off to the folks' house, good luck.

 

Thanks for all the support. I resetted the engine light by disconnecting the battery!!! It didnt come back up. I guess it's ok now. Thanks again!! If i have any problems, I'll let you know.

 

Wow dude. You're a genius. Next time my engine throws
a code I'll just reset the ECM to repair it. Thanks for
the info.! [laughing]

 

bro i have the same code that just came up... i m trying to diagnose it....

 

If you notice, I had a pretty bad exhaust leak. That was fixed but the light wasnt reset, SO I DID IT. If its something that bad, it will come back up!!!

 

Settle down flame-bird. You "resetted" your light. Ok, I suspect you "hadded" an exhaust leak or something relateded" to the EGR. If your light "comes back up" now you have some "answerses". So get on with it. (BTW, I don't believe you have a full command of the English language, but whatever).

 

lol.. comedian..