Hi,

I just started using OBD2 For my MK3(Diesel) recently.

I was connected with OBD2 (with Forscan ) to check for the DPF soot load and any probable need for cleaning or static regeneration.

Before I could do anything for this I observed the EGT sensor voltage are always high and just changing between 4.98 or 4.99V and this does not change to other values with high rev or any other variation like engine on time etc. 

I waited for some time with engine on for 5-10 minutes with changing rev from idle to approx 2500. With all my checks the EGT remained always toggling between values like 4.98 or 4.99 Volt.

Surprising no engine lamp in the dash or any major performance issue so far. Any expert opinion if I am missing something ? Do I need to  consider changing EGT sensor proactively now for avoid future damage ?

 

Details : Ford Focus MK3 1.6 tdci, 2014 , Mileage : approx 104000 miles.

Any other clue will highly be appreciated. 

Thanks in advance.

Kind regards,

MS

These don't use a separate EGT sensor.  That could just be a default value for a missing sensor, although I wouldn't expect any change in figures in that case.  If those are the voltages from the cat temp sensors then you can see the cat is still cold and hasn't passed it's 100c minimum there.  You won't heat the cat just by revving it while stationary.

To me, the DPF pressure differential values are the key indicator and your values look good:
 Differential pressure at idle 2-10 mbar (0.2- 1kPa)
 At 3000 rpm, 40-80 mbar (MAX 100 mBar, 10 kPa)
Should be zero with engine off.
I always recommend Jimmy's channel for DPF confidence and he avoids forced regens:
https://www.youtube.com/@ORileysAutos/videos

16 hours ago, MS7 said:

no engine lamp in the dash or any major performance issue

For me, this is the most important bit. It's possible to spend a lot of time and money chasing non-existent problems caused by misunderstanding numbers in the data. If it's running properly just drive it until something actually goes wrong.

1 hour ago, pcaouolte said:

If it's running properly just drive it

"if it ain't broke don't fix it" 😉

Thanks everyone for the insights. I go wait n watch now.