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In this video I have a look at a Nissan Sentra that came in with some EGR trouble. It had a P0400 causing the engine light to come on. Pretty simple system so let's have a look to see if we can fix it. -Enjoy!
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50 thoughts on “Nissan sentra: p0400 egr system malfunction”
  1. Avataaar/Circle Created with python_avatars William Mize says:

    If it ain't broke don't fix it?

  2. Avataaar/Circle Created with python_avatars NIKOS GIAGKOULAS says:

    My friend I followed your instructions and took apart the whole EGR system from the manifold to the exhaust and cleaned it . I also took apart the whole valve and it seemed to be stuck like yours. I don't know if it was truly stuck, since I have no engine light on or code reader to check, but the EGR tube was always cold. Thank you for the excellent instructions

  3. Avataaar/Circle Created with python_avatars Jim Bos says:

    This channel shoud be mandatory watching for all Automotive Engineers who build these things. The Executives too.

  4. Avataaar/Circle Created with python_avatars Ron N says:

    EGRs get hot.
    I would have lubricated it with a few drops of synthetic motor oil, which is much more heat resistant.

  5. Avataaar/Circle Created with python_avatars Jay Tyree says:

    Great video

  6. Avataaar/Circle Created with python_avatars oscar cruz says:

    So the washer goes with the fingers down to the bearings?

  7. Avataaar/Circle Created with python_avatars mrdfoutz says:

    Impressive knowledge, as always. Scottie would probably tell you you're stupid for spending that much time trying to serve the customer, but who the thunder would even want Scottie to wash their windshield? 🤣

  8. Avataaar/Circle Created with python_avatars Mark McKelvy says:

    Hey there viewers and welcome back to the self made auto channel 😀

  9. Avataaar/Circle Created with python_avatars John E. Carr says:

    Another great video.

  10. Avataaar/Circle Created with python_avatars Tom Beilman says:

    From what I’ve watched on you tube cats can’t be cleaned to work again, nothing like a little panther piss in your coffee cup to spice it up

  11. Avataaar/Circle Created with python_avatars Bill Pawelczyk says:

    I have a Nissan Xterra some of them exhaust gas regulators I do I'm happy I don't

  12. Avataaar/Circle Created with python_avatars Jerry Plante says:

    I have a PAC brake like that. Works great on the bench, works fine installed loosely, butterfly is free. Tighten everything down – no worky.

  13. Avataaar/Circle Created with python_avatars David summers says:

    Too bad the heat will dry out to Gibbs and it’ll stick again LOL

  14. Avataaar/Circle Created with python_avatars R. B.L. says:

    I am getting pretty good at guessing the year of the video from the condition of Mr' O' Jeep hat !
    Great vid, just saved that lady $300 on the EGR – to lessen the sting of the new CAT!

  15. Avataaar/Circle Created with python_avatars Kenneth Franklin says:

    Who is Ivan?

  16. Avataaar/Circle Created with python_avatars 7dioclau says:

    Part number of that small 3/8 ratchet??

  17. Avataaar/Circle Created with python_avatars w2dmw says:

    I've had pretty good, lasting results, using graphite-type heat proof dry type lubes. I know KANO, maker of Kroil, makes a "Pyrolube" that is for high heat
    …just something to think about…..

  18. Avataaar/Circle Created with python_avatars Yaseen Hashim says:

    awesome excellent job thanks always doing a nice diagnosing gooooooood

  19. Avataaar/Circle Created with python_avatars Shane Harrison says:

    Lol that brings back memories of days gone by

  20. Avataaar/Circle Created with python_avatars Paul Dougherty says:

    I had a 91 s10 blazer with the 4.3L. Without fail Every 5,000 miles or so I have to take the EGR valve to give it a good cleaning.

  21. Avataaar/Circle Created with python_avatars Naji Eid says:

    Hi Mr. O, you have condemned the cat as is not storing oxygen without diagnosis. What if the ox sensor is lying?

  22. Avataaar/Circle Created with python_avatars Peter Merry says:

    DUDE! You Rock! Thank you for going the xtra mile! Just what I needed to see.

  23. Avataaar/Circle Created with python_avatars chris dalkin says:

    what is big nasties music thanks in advance

  24. Avataaar/Circle Created with python_avatars Hector Romero says:

    I have the same exact vehicle and I was wondering is there anyway to just temporarily bypassed that EGR valve like maybe plugging up the two rubber hoses in the back just to see if the car runs correctly like that ? because my car won’t stay on while idling?

  25. Avataaar/Circle Created with python_avatars rick dun says:

    I have a 1997 Honda Passport 3.2 engine with EGR valve problem -code for "insufficient EGR flow" crops up. I have checked the EGR pipes for blockage – it is very clean. I checked the EGR valve and it is clean. I then checked air intake manifold and throttle body – they were a little bit dirty-cleaned anyway. The code keeps appearing every other day or so or sometimes doesn't show up for several weeks. I even replaced EGR valve. What sensor tells computer the insufficient flow condition? I don't see any other sensors in EGR system. Kinda driving me crazy-any help out there? Car only has 77,000 miles on it. Thanks!

  26. Avataaar/Circle Created with python_avatars Boggy says:

    I had an 01 Sentra 1.8 from new until three years ago. The 2nd owner is an associate and he's still driving it. On its original engine, mid 200,000 miles. Not the fanciest car but a very good car. Responsive engine, plenty powerful for the car.

  27. Avataaar/Circle Created with python_avatars Colin Parkinson says:

    Or an oil drain pan, everything falls into that. Bolts, nuts, sockets and wrenches are oil seeking.

  28. Avataaar/Circle Created with python_avatars FrugalPrepper's Garage & Garden says:

    He straight up Ivaned that EGR valve

  29. Avataaar/Circle Created with python_avatars DragonBlade says:

    I have a p0400 on my 1998 k1500 pickup. Is the code the same for my truck. If its egr I'd love to know

  30. Avataaar/Circle Created with python_avatars Alen Yegiyants says:

    What does it means on scanner first time user don't judge me. No powertrain DTC or freeze frame data found in vehicles computer

  31. Avataaar/Circle Created with python_avatars Alen Yegiyants says:

    So if that thing going up and down does it means it's good? But it shoeing me that thing

  32. Avataaar/Circle Created with python_avatars Rockcycle Studio says:

    Good video Eric thanks for your time Brother!

  33. Avataaar/Circle Created with python_avatars alvin boreo says:

    Ewww a nissan

  34. Avataaar/Circle Created with python_avatars Arturo Núñez Dorantes says:

    What do you think in cleaning this valve with an ultrasonic bowl?

  35. Avataaar/Circle Created with python_avatars Frankie says:

    Can you clean a cat with thinners or acetone, explosive but did hear it could be done.

  36. Avataaar/Circle Created with python_avatars Patrick Smith says:

    Got a old motorcycle oil can paper-cardboard can , know you like license plates, if your interested I will send it your way (still full), thought I'd pack it in big pvc pipe seal it up ?

  37. Avataaar/Circle Created with python_avatars Charles Carrigan says:

    Where can I get a sweet little carbide scraper like the one used on the aluminum crust?