CoreDiag gives every technician an AI-powered second opinion the moment they pull up a repair order — no new workflow, no extra steps.
Early access is free. No credit card required.
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Intermittent rough idle on a 5.0L F-150 with a cycling MIL is consistent with a VCT system fault or carbon buildup on intake valves. Recommend pulling freeze frame data and checking for P0011/P0021 before disassembly.
How it works
A service writer creates or updates a repair order — in CoreDiag or synced from Tekmetric. No change to your process.
CoreDiag reads the vehicle, concern, history, and NHTSA data. A structured diagnostic suggestion is generated in seconds.
The suggestion appears as a note on the RO. The tech sees it the moment they pull up the ticket — and can rate its accuracy when the job is done.
"My techs started asking for it on every ticket."
— Shop Owner, Independent Repair · Currently Running CoreDiag
Who it's for
Running tight margins with a mixed team? CoreDiag helps your junior techs diagnose like your best tech — on every single ticket.
Give the tech a head start before they even open the hood. Better diagnostics means fewer comebacks and faster approvals.
Already on Tekmetric? CoreDiag integrates directly — suggestions appear as RO notes with no manual steps or duplicate entry.
Track suggestion accuracy over time. See which vehicles your team struggles with. Build a smarter shop with data you didn't have before.
Pricing
Solo
per location / month
Connect
per location / month
Pro
per location / month
All plans include a 14-day free trial. No credit card required to start.
CoreDiag is currently accepting early access shops. Request your spot — we'll follow up within one business day.
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No spam. No pressure. Just a quick conversation about your shop.