Skip to content
View in the app

A better way to browse. Learn more.
Ford Owners Club - Ford Forums

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.



Join the Independent Ford Owners' Club

Our community has been built by enthusiasts, for enthusiasts, and proudly run by Ford owners' for over 18 years. As an independent, non-official club, everything you’ll find here, advice, support, and opinions, comes directly from members with genuine Ford ownership experience.

Join our friendly community... it's Free!

 

Exhaust gas temperature sensor behaviour

Sausage2026
Sausage2026
in Ford Focus Club

Featured Replies

Apologies to start a new thread, but I’d like to ask this as a distinct question for anyone who might have an idea:

I’ve got a Focus ST Diesel Mk3.5, failing regens.

My question is how do the temp sensors behave? I have EGT4, which I think is post-DPF reading -40C, but still getting voltage. I unplugged another one of the working sensors in the DPF, and it stayed at its default value of 100C.

Why would the EGT4 read -40C even whilst disconnected? Is it a different type of sensor?

Ford sent me a diagram and got me to say which one it was, as they don’t have descriptions apparently their other than “sensor”

I have already ordered the part , no refunds unfortunately since they ordered it in. £186. And there’s no aftermarket alternative.

Against my sensible instincts, I reset the DPF took it for a hard drive and attempted a static, which it almost immediately aborted.

Is this a reason for it to fail regens?

IMG_7001.jpeg

  • Quote


    • Latest Deals

    Ford UK Shop for genuine Ford parts & accessories

    Disclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via the club

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Reply to this topic...
    Go to topic listing

    The "Digestive"

    • The Digestive Forum Roundup (24th May - 31st May 2026)

      Steve ·
      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
      Steve
      Steve
      • 157 views





    Background Picker
    Customize Layout

    Account

    Navigation

    Search

    Search

    Configure browser push notifications
    Chrome (Android)
    1. Tap the lock icon next to the address bar.
    2. Tap Permissions → Notifications.
    3. Adjust your preference.
    Chrome (Desktop)
    1. Click the padlock icon in the address bar.
    2. Select Site settings.
    3. Find Notifications and adjust your preference.