Diagolia · Automotive diagnostic assistance

A fault codedoes not tell youwhat to repair.

Diagolia cross-checks fault codes, symptoms, technical documentation and field cases to rank likely causes and guide checks before replacement.

3 free diagnostics The technician makes the final decision

A DTC points to a system. Not always the part to replace.

Without cross-checking symptoms, measurements and vehicle context, a familiar lead can result in a rushed repair.

01

The code points the way

On its own, it does not account for the full context.

02

Context refines the lead

Symptoms, measurements and previous work can support or challenge the first hypothesis.

03

Checks confirm the fault

A cause remains a hypothesis until the technician validates it.

Workshop example

P20EE

DTC

Initial signal

SCR catalyst efficiency

Rushed conclusion

Catalyst blamed

Cross-checked approach

AdBlue injection, fluid quality, NOx readings and adaptations to check

The code is a starting point, not the final answer.

The diagnostic in Diagolia

See why one lead ranks ahead of another.

Diagolia connects each cause to the supporting evidence and the checks to perform. Leads remain hypotheses to confirm.

D Diagolia
PEUGEOT 2008 P20EE Case in progress

Possible causes

Prioritized from the evidence available in this case.

P20EE
01

Priority cause to check

Clogged AdBlue injector

A clogged or crystallized injector can disrupt SCR dosing and contribute to P20EE.
Useful checks
  • Inspect the injector outlet
  • Check the spray pattern
  • Look for crystallization
Why this lead?

Fault scan A cause to rule out before the catalyst The injector is consistent with the SCR context and the recorded code.

Field case Similar symptoms Comparable cases point to dosing and blockage checks before replacement.

Other causes to confirm

02 NOx sensor To confirm
03 Insufficient or incorrect AdBlue level To confirm
04 SCR adaptations to review To confirm
01

Sources brought together

Fault codes, documentation, web research and field cases.

02

Causes ranked

The most consistent hypotheses rise to the top.

03

Checks attached

Each lead comes with concrete checks.

How it works

From workshop input to useful checks.

A four-step process that keeps the reasoning clear and the decision in professional hands.
01

Describe the case

Vehicle, DTCs, symptoms, measurements and work already performed.

02

Cross-check sources

Diagolia connects documentation, web research and field cases.

03

Review the priorities

Causes are ranked with the evidence supporting each lead.

04

Check and decide

The technician performs the relevant checks before any intervention.

What changes in the workshop

01

One structured case

All information stays within the same context.

02

Explained leads

Each priority is connected to the available evidence.

03

A professional decision

The technician keeps final control.

Pricing

Start with 3 free diagnostics.

One credit is used when a diagnostic starts. Then choose the volume that fits your needs.

1 credit = 1 diagnostic

Discovery

To try Diagolia on a few cases.
€0 3 free credits
Diagnostics included Technical documentation included Lighter web research Limited AI conversation Photos not included Limited vehicle information
Try for free

FAQ

What to know before getting started.

Diagolia assists the diagnostic process; it replaces neither the scan tool nor the technician’s validation.
Does Diagolia replace the technician?

No. It brings case information together, cross-checks sources and ranks possible causes. Checks and the final decision remain with the professional.

Does Diagolia identify the fault with certainty?

No. Causes are ranked by plausibility and must then be confirmed through physical checks before any intervention.

What information can Diagolia cross-check?

Fault codes, symptoms, measurements, technical documentation, web research, field cases and added photos, depending on the plan and available information.

Do I need a diagnostic scan tool?

It is recommended. Diagolia uses the codes, measurements and observations already recorded; it complements the scan tool without replacing it.

What does the Discovery plan include?

Three free credits, equal to three diagnostics, with technical documentation, lighter web research and limited AI conversation. Photos are not included and vehicle information is limited.

Is it suitable for independent workshops?

Yes. Diagolia is designed for workshops, technicians and diagnosticians, especially for complex faults, ambiguous codes and intermittent cases.

Can I use it with different vehicles?

Yes. Credit volume and some features depend on the selected plan.

Still have a question?

Contact us

Built with field feedback

Diagnostic assistance designed around real workshop practice

Diagolia is developed with feedback from around one hundred automotive technicians, mainly European, working in dealerships, service centres and independent repair shops. The decision and validation remain with the technician.

Diagolia in the workshop

Bring the evidence together before replacing a part.

Diagolia brings sources together, ranks likely causes and turns leads into concrete checks.

Try for free Contact us
3 free diagnostics