# OBD2 Car Diagnostics — DTC Codes & Car Maintenance

> DTC Codes & Car Maintenance (iPhone/iPad app by Linh Phan Nhat Khanh.)

- Source: https://appshunter.io/ios/app/obd2-car-diagnostics/id6768301997 (this page in markdown: same URL + `.md`)
- Developer: [Linh Phan Nhat Khanh](https://appshunter.io/developer/1777727575)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-06-11
- Data updated: 2026-06-12
- User reviews in markdown: https://appshunter.io/ios/app/obd2-car-diagnostics/id6768301997/reviews.md

## What is OBD2 Car Diagnostics?

OBD2 Car Diagnostics puts a professional-grade fault code reference and vehicle maintenance tracker right in your pocket. Whether your check engine light just came on or you want to stay ahead of routine service, this app gives you the clarity you need.

INSTANT DTC LOOKUP
Search thousands of OBD2 diagnostic trouble codes by code number, description, or vehicle system. Each code entry shows the affected system, plain-English description, and a severity rating — Critical, High, Medium, or Low — so you know exactly how urgent the issue is.

FILTER BY SYSTEM AND SEVERITY
Quickly narrow results by vehicle system (engine, transmission, ABS, airbag, EVAP, and more) or by severity. Save codes you care about with a single tap and review them anytime in the Saved tab.

MULTI-VEHICLE GARAGE
Add all your cars, trucks, or motorcycles. Each vehicle shows its current odometer reading and a colour-coded maintenance health ring at a glance. Track make, model, year, and mileage for every vehicle in one place.

MAINTENANCE REMINDERS
Set odometer-based service reminders for oil changes, tyre rotations, brake inspections, air filters, and more. The Dashboard immediately surfaces any service that is due or overdue so nothing slips through the cracks.

SERVICE HISTORY AND COST TRACKING
Log every service visit with date, odometer, cost, and notes. View running totals per vehicle and share a full service report as plain text whenever you need it for insurance, resale, or your own records.

Key features:
- Offline DTC database — no internet connection required
- Severity ratings: Critical, High, Medium, Low
- Filter by category and severity simultaneously
- Save and manage fault codes per vehicle
- Odometer-based maintenance reminders
- Full service log with cost tracking
- Share vehicle reports in plain text
- Dark mode support


## Version history (last 1 release)

### 1.0 — 2026-06-11

No release notes.

## More apps by Linh Phan Nhat Khanh

- [AI Note Taker: Audio Notes](https://appshunter.io/ios/app/ai-note-taker-audio-notes/id6737747476)
- [Controller Fly for DJI Drones](https://appshunter.io/ios/app/controller-fly-for-dji-drones/id6752404884)
- [Quick Note: Notepad & Widget](https://appshunter.io/ios/app/quick-note-notepad-and-widget/id6756231129)
- [Year Plan - Goal Planner](https://appshunter.io/ios/app/year-plan-goal-planner/id6760195784)
- [HabitForge: Streak Tracker](https://appshunter.io/ios/app/habitforge-streak-tracker/id6768294604)
- [Tapeline: Body Ledger & BMI](https://appshunter.io/ios/app/tapeline-body-ledger-and-bmi/id6768296052)

All apps by Linh Phan Nhat Khanh: https://appshunter.io/developer/1777727575

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-12.*