Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Track AI Overviews in Keyword Research
      Moz Pro

      Track AI Overviews in Keyword Research

      Try it free!
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Technical SEO
    4. Intermittent 404 - What causes them and how to fix?

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Intermittent 404 - What causes them and how to fix?

    Technical SEO
    2
    2
    2066
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • daniel-brooks
      daniel-brooks Subscriber last edited by

      Hi!

      I'm working on a client site at the moment and I've discovered a couple of pages that are 404ing but producing a 200 OK response.

      However, I have checked these URLs again and some are now producing a 404 Error response. No changes have been made (that I'm aware of) so it appears that the URLs are returning both 200 OK and 404 Error responses intermittently.

      Any ideas what could cause this and the best solution?

      Thanks!

      1 Reply Last reply Reply Quote 0
      • seanginnaw
        seanginnaw last edited by

        Hi Daniel,

        That does seem very odd!

        There can be various different things at play here in my experience:

        1. Publishing and un-publishing in the CMS - Sometimes clients and CMS users will switch the page publish status around which can make it difficult to keep track of whether the page exists or not
        2. Removal of redirects - Much the same as above, there's the possibility that someone is adding/removing redirects. This could also be something to do with the removal of the server level redirects file, be that htaccess or IIS.
        3. Crawling tool issue - If you're using a crawling tool (especially if doing so with JS rendering active), sometimes this can put a lot of pressure on the server and it can spit out the occasional error where there actually isn't one

        It could also be a problem with how you're handing hard 404 errors vs soft 404s - i.e. actual not founds vs pages that don't function but the server is under the impression that they're fine.

        Best of luck!

        Sean

        1 Reply Last reply Reply Quote 0
        • 1 / 1
        • First post
          Last post

        Got a burning SEO question?

        Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


        Start my free trial


        Browse Questions

        Explore more categories

        • Moz Tools

          Chat with the community about the Moz tools.

        • SEO Tactics

          Discuss the SEO process with fellow marketers

        • Community

          Discuss industry events, jobs, and news!

        • Digital Marketing

          Chat about tactics outside of SEO

        • Research & Trends

          Dive into research and trends in the search industry.

        • Support

          Connect on product support and feature requests.

        • See all categories

        Related Questions

        • CREW-MARKETING

          Quick Fix to "Duplicate page without canonical tag"?

          When we pull up Google Search Console, in the Index Coverage section, under the category of Excluded, there is a sub-category called ‘Duplicate page without canonical tag’.  The majority of the 665 pages in that section are from a test environment. If we were to include in the robots.txt file, a wildcard to cover every URL that started with the particular root URL ("www.domain.com/host/"), could we eliminate the majority of these errors? That solution is not one of the 5 or 6 recommended solutions that the Google Search Console Help section text suggests.  It seems like a simple effective solution.  Are we missing something?

          Technical SEO | | CREW-MARKETING
          1
        • AfroSEO

          422 vs 404 Status Codes

          We work with an automotive industry platform provider and whenever a vehicle is removed from inventory, a 404 error is returned. Being that inventory moves so quickly, we have a host of 404 errors in search console. The fix that the platform provider proposed was to return a 422 status code vs a 404. I'm not familiar with how a 422 may impact our optimization efforts. Is this a good approach, since there is no scalable way to 301 redirect all of those dead inventory pages.

          Technical SEO | | AfroSEO
          0
        • A_Fotografy

          Yoast SEO. After set up 404 error pages

          Hello all, Something strange happened with my blog site. I recently signed to MOZ tools. Initially everything was fine, but during my last crawl I got loads of 404
          pages. Few days ago I was tweaking some settings in SEO plugin according to this post https://moz.com/blog/setup-wordpress-for-seo-success What I noticed was that 404 pages were coming from my blog posts, but for
          some reason category was missing in those posts. For example this link is 404
          https://a-fotografy.co.uk/inchcolm-island-wedding-photography-bailie The one with category is https://a-fotografy.co.uk/wedding-pictures/inchcolm-island-wedding-photography-bailie/ So basically for some reason category was missing. Please let me know how can I fix this instead of doing hundreds of
          redirects now. Thank you,
          Regards,
          Armands

          Technical SEO | | A_Fotografy
          0
        • CommercePundit

          How to fix keyword cannibalization?

          Hello All, I am a webmaster of http://www.bannerbuzz.com and I have some problem in keyword cannibalization in my store, i have lots of categories related to banners, and in Banner section my my keyword is vinyl banners and my all categories urls structure connected with vinyl banners, I am definitely sure that keyword cannibalization issue in my website and i want to resolve it as soon as possible, so can anyone please help me how can i resolve this issue with effective way or without affected my keyword ranking? My Keywords Vinyl Banners      : http://www.bannerbuzz.com/full-color-vinyl-banners.html
          Custom Banners  : http://www.bannerbuzz.com/custom-vinyl-banners.html
          Outdoor Banners   : http://www.bannerbuzz.com/outdoor-vinyl-banners.html My 1 keyword vinyl banners is affected, so can anyone please look at these pages and let me know how can i resolve keyword cannibalization from my website.? Thanks
          BannerBuzz.com

          Technical SEO | | CommercePundit
          0
        • mtthompsons

          Backlinks that we have if they are 404?

          Hi All, Backlinks that we have if they are 404? Open site explorer shows 1,000 of links and when I check many are 404 and those are spammy links which we had but now the sites are 404 I am doing a link profile check which is cleaning up all spammy links Should i take any action on them? As open site explorer or Google still shows these links on the searches. Should we mention these URL's in disallow in Google webmaster. Thanks

          Technical SEO | | mtthompsons
          0
        • JohnHuynh

          Miss meta description on 404 page

          Hi, My 404 page did not have meta description. Is it an error? Because I run report and seomoz said that a problem. Thanks!

          Technical SEO | | JohnHuynh
          0
        • anchorwave

          Best 404 Error Checker?

          I have a client with a lot of 404 errors from Web Master Tools, and i have to go through and check each of the links because Some redirect to the correct page Some redirect to another url but its a 404 error Some are just 404 errors Does anyone know of a tool where i can dump all of the urls and it will tell me If the url is redirected, and to where if the page is a 404 or other error Any tips or suggestions will be really appreciated! Thanks SEO Moz'rs

          Technical SEO | | anchorwave
          0
        • dreadmichael

          How to find a specific link on my website (currently causing redirects)

          Hi everyone, I've used crawlers like Xenu to find broken links before, and I love these tools. What I can't figure out is how to find specific pieces of code within my site. For example, Webmaster Tools tells me there are still links to old pages somewhere on my website but I just can't find them. Do you know of a crawler that can search for a specific link within the html? Thanks in advance, Josh

          Technical SEO | | dreadmichael
          0

        Get started with Moz Pro!

        Unlock the power of advanced SEO tools and data-driven insights.

        Start my free trial
        Products
        • Moz Pro
        • Moz Local
        • Moz API
        • Moz Data
        • STAT
        • Product Updates
        Moz Solutions
        • SMB Solutions
        • Agency Solutions
        • Enterprise Solutions
        • Digital Marketers
        Free SEO Tools
        • Domain Authority Checker
        • Link Explorer
        • Keyword Explorer
        • Competitive Research
        • Brand Authority Checker
        • Local Citation Checker
        • MozBar Extension
        • MozCast
        Resources
        • Blog
        • SEO Learning Center
        • Help Hub
        • Beginner's Guide to SEO
        • How-to Guides
        • Moz Academy
        • API Docs
        About Moz
        • About
        • Team
        • Careers
        • Contact
        Why Moz
        • Case Studies
        • Testimonials
        Get Involved
        • Become an Affiliate
        • MozCon
        • Webinars
        • Practical Marketer Series
        • MozPod
        Connect with us

        Contact the Help team

        Join our newsletter
        Moz logo
        © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
        • Accessibility
        • Terms of Use
        • Privacy

        Looks like your connection to Moz was lost, please wait while we try to reconnect.