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Built by mechanics in a working Australian workshop

Diagnose smarter.Fix faster.

Enter your fault codes, snap a photo of your scan tool, or just describe what the car is doing. FaultMate tells you the likely causes, what to check first, what it should cost, and whether it's safe to drive.

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All makes and models
No subscription needed
Costs in Aussie dollars
2019 Toyota Hilux, 2.8L diesel, 142,300 km
Valid fault codePowertrain, generic (P0xxx)
Downstream O2 sensor slow45%
Exhaust leak before the sensor30%
Catalytic converter efficiency25%

Example diagnosis. Ranked causes, cheapest checks first.

How it works

From warning light to answer in minutes

No jargon, no guesswork, no paying a shop to plug in a scan tool just to find out what a code means.

  1. Add your vehicle

    Pick the make, model and year so the answer fits your exact car, not a generic one.

  2. Tell it what's wrong

    Type your fault codes, photograph your scan tool screen, or describe the problem in your own words.

  3. Get the likely causes

    Ranked by probability, with what to check first, a cost range, and whether it's a DIY or workshop job.

  4. Narrow it down

    Answer a few follow-up questions and the diagnosis sharpens. Then find a trusted workshop near you.

P0420 Catalyst efficiency below threshold
2019 Toyota Hilux, Powertrain
Needs attention
Drive with caution. OK short term. Get it checked within a few weeks to avoid converter damage.
Downstream O2 sensor slow45%
Moderate$250 to $450
Exhaust leak before the sensor30%
Workshop$150 to $400
Catalytic converter25%
Workshop$1,200 to $2,400
What you get

Know what's wrong before you walk into a shop

Every diagnosis is built for your specific vehicle, using real workshop experience and confirmed fixes.

  • Is it safe to drive?

    A straight answer first: fine for now, get it looked at soon, or don't drive it.

  • Most likely causes, ranked

    Not a list of everything it could be. The cheapest and most likely checks come first.

  • What it should cost

    Parts and labour ranges in Aussie dollars, so you know if a quote is fair.

  • DIY or workshop?

    Every cause is rated, so you know what you can tackle at home and what needs a professional.

One brand, two solutions

Built for every journey

Plain answers for drivers. Proper test plans for the trade.

FaultMate

For everyday drivers

  • Plain-English explanations of what's wrong
  • Know whether it's safe to keep driving
  • Repair costs before you visit a shop
  • Saved diagnosis history for each vehicle
  • Find a trusted workshop near you and send them your diagnosis
Get FaultMate

FaultMatePro

For technicians and workshops

  • Step-by-step test plans with expected values
  • Multiple codes traced back to one root cause
  • Workshop dashboard across all your jobs
  • Free listing so local drivers can find you
  • 150 diagnoses a month for busy shops
Get FaultMate Pro
For workshops

Customers who already know what's wrong

When a FaultMate driver near you needs a workshop, your shop shows up. They can call you, get directions, or send you their full diagnosis before they arrive: the car, the codes and the likely causes.

  • Diagnoses emailed to you

    New customer leads land in your inbox the moment they're sent.

  • Matched to the job

    Tell us what you work on, and you show up for the faults you actually fix.

  • Checked by us

    Every workshop is reviewed before it's listed, so drivers can trust who they find.

List your workshop
Your workshopNear you
3.2 km away · Brakes, Exhaust, General servicing
CallDirectionsSend my diagnosis
New customer diagnosisJust now
Ben · 0400 000 000 · 2019 Toyota Hilux (123ABC)
P0420 · Likely downstream O2 sensor (45%), exhaust leak (30%)
“Can you look at it Thursday?”
Pricing

Simple, transparent pricing

Start with 2 free diagnoses. Then pay as you go, or save with a monthly plan. No hidden fees.

Single diagnosis

$4.99
one-off

One diagnosis with follow-up questions. No subscription.

Get started

10-pack

$29.99
one-off, credits never expire

Ten diagnoses to use whenever you need them.

Get started

FaultMate

$9.99
per month

10 diagnoses every month for the family's cars. Cancel any time.

Get FaultMate

FaultMate Pro

$79
per month

150 diagnoses a month, test plans, workshop dashboard and listing.

Get Pro

Prices in Australian dollars. Every new account gets 2 free diagnoses.

Questions

Good to know

Does FaultMate replace a mechanic?

No. It tells you what's most likely wrong, what to check first and what it should cost, so you can make a good decision. Safety-critical faults like brakes, steering and airbags should always be checked by a qualified mechanic, and FaultMate will tell you when.

Do I need a scan tool?

No. You can describe what the car is doing in your own words. If you do have codes from a scan tool or a workshop, add them, or just take a photo of the screen and FaultMate reads the codes for you.

What cars does it work with?

All makes and models: cars, SUVs, utes and vans, petrol, diesel, hybrid and electric. Add your series or variant (like RG or N80) for the most accurate answer.

What if FaultMate gets it wrong?

Tell us with the Report a mistake button on your diagnosis. If it's a genuine error, we fix it for everyone with the same vehicle and refund your credit.

Do credits expire?

Credits from single diagnoses and 10-packs never expire. Monthly plan credits carry over while your plan is active.

I run a workshop. How do I get listed?

Sign up for FaultMate Pro, then tick "I own or run a workshop" and fill in your details. We check every workshop before it goes live, usually within one business day.

Smarter diagnostics for a smoother journey.

Your first 2 diagnoses are free. No card needed to sign up.

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