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Usually (but not always) when a V6 Honda picks up an EGR code it's because the EGR passage in the upper intake has become clogged with carbon. To repair:

Remove the upper intake from the car and lay it upside down. Locate the clogged port. Use a 3/8" drillbit and turn it (by hand - not power drill) to ream the carbon out of the passage. Set the intake back into place and clear the codes. A stainless steel sleeve may be available from Honda to reduce the likelihood of this problem happening again on some application. Also, if your engine is worn and burns a lot of oil or if you tend to do mostly short trips of less than 15 minutes or if you tend to overfill your oil or tailgate diesel trucks, chances of this happening again are increased.

Sometimes this code comes up when an EGR valve goes bad and needs to be replaced.

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Q: I have Honda accord 1995 v6 ex 4 dr how do you fix the p0140 egr dtc also what is the best place to buy spare parts for Honda?
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