“Who Is Andras, and Why Does He Talk to DPFs?”

Introduction

If you’re reading this, there’s a good chance you’ve met a yellow or red engine light that glows with the same stubborn persistence as passive aggression in a bad relationship.

And I’m Andras — the guy who has been trying to understand since 1994 why diesel engines sometimes decide to get offended by the world.

And sometimes… I actually do understand them.

The Story So Far (and How It Usually Goes)

Back in ’94, diagnostics were basically:

– “Andras, do you hear that noise?”– “Yeah… that’s the third bolt from the right.”

Then the years rolled by, and suddenly everything had:

sensors,feedback loops,PID control,compensation tables,

…and sometimes I swear even the water pump uses AI against me.

But this chaos is what keeps me alive.

Why Diesels?

Because diesels don’t lie.

A diesel is brutally honest.When something’s wrong, it doesn’t politely hint at it — it throws the entire DPF disaster at you with a P2002 and expects you to assemble the jigsaw puzzle.

And I love that part.

Opening the Autel or Launch scanner, looking at live data, and instantly saying:

“Okay… someone here is lying.”

The MAP or the MAF — they can’t both be right.And that’s when the real fun begins.

AI: The Assistant Who Doesn’t Replace Me (But Makes Me Faster)

In my world, AI doesn’t “take over” the job.

AI is like a super-fast, tireless apprentice who:

– spots unusual patterns,– highlights where the data deviates,– summarises the live readings,– and sometimes taps my shoulder:“Andras, check that sensor again.”

But the decisions? That’s all me.The responsibility? Also mine.And the colourful swearing? Definitely mine.

AI is the compass — I do the navigating.

What Do I Actually Do?

In this trade, many people clear a fault code and tell the customer:

“Try it now.”

Not me.

I say:“Let’s find out WHY it does that.”

DPF, AdBlue, EGR, boost leaks, NOx correction — these are my Sherlock Holmes cases.

I diagnose on-site, clean on-site, and deliver a proper report, filled with real data… not prayers.

Why Write a Book? Why a Blog?

Because I work in the field.Because every single day something happens that could teach another technician, another customer, or anyone terrified of a DPF replacement.

My goals are simple:

– show how I think on the job,– how I analyse live data,– how I identify the root cause, not the symptom,– and how AI helps me — under my supervision.

No secrets.Good diagnostics aren’t magic — they’re finely tuned logic.