99 SE code P400

140K, no driveability issue. Had coolant flush and tires, oil change today- my buddy owns shop and said see what happens if code comes back, gather more info before spending any money, could be several things. Car seems to be running fine.

Any particular place to start?

Thanks

Dave

Reply to
davidb1
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The EGR system, the port is clogged.

Reply to
NissTech

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