# J1939OBD — Diagnose Tool für Motoren

> Diagnose Tool für Motoren (iPhone/iPad app by S.Koepge.)

- Source: https://appshunter.io/ios/app/j1939obd/id1453435912 (this page in markdown: same URL + `.md`)
- Developer: [S.Koepge](https://appshunter.io/developer/340731168)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 12.1 · 14 MB
- Languages: American English, German (Germany)
- Released: 2019-03-30
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/j1939obd/id1453435912/reviews.md

## What is J1939OBD?

A diagnostic app for industrial and commercial vehicle engines using the J1939 CAN protocol.

The app supports the following functions:
- Display the active error codes
- Display the passive error codes
- Delete the error codes
- Display of engine measured values
- Information about the status DPF
- Information about the SCR system
- Information about fuel consumption 
- Engine information
- Terminal mode

To connect to the engine you need an EML327 compatible Wifi OBD interface as of V1.4 and a connection cable from the diagnostic connector to OBD. Various manufacturers offer corresponding cables, as well as a well-known engine manufacturer from Cologne, who distributes a corresponding adapter cable via his dealer network. Visit my homepage for further informations.
An EML327 Wifi interface is offered on known Internet platforms.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Get full access for 1939OBD | $3.99 | one-time |



## Version history (last 3 releases)

### 1.3 — 2026-01-13

Bug fixes and performance improvements

### 1.2 — 2021-01-14

- improved EML327 communication
- dark mode supported

### 1.0 — 2019-03-29

No release notes.

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| --- | --- | --- | --- |
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| [myWIKA wireless device](https://appshunter.io/ios/app/mywika-wireless-device/id1451623605) | — | Free | Productivity |
| [I/O Field](https://appshunter.io/ios/app/io-field/id1475074379) | — | Free | Productivity |
| [COMBIVIS mobile](https://appshunter.io/ios/app/combivis-mobile/id1399585561) | — | Free | Productivity |
| [Odrid HMI](https://appshunter.io/ios/app/odrid-hmi/id1066799333) | 4.0 (4) | $34.99 | Productivity |
| [ModTest Pro](https://appshunter.io/ios/app/modtest-pro/id1552784932) | — | $9.99 | Productivity |

## More apps by S.Koepge

- [PassTab](https://appshunter.io/ios/app/passtab/id927029538)
- [OwnControl](https://appshunter.io/ios/app/owncontrol/id1332830345)
- [Vocty](https://appshunter.io/ios/app/vocty/id1509532345)

All apps by S.Koepge: https://appshunter.io/developer/340731168

## Related topics

[j1939obd](https://appshunter.io/ios/topics/j1939obd)

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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 2026-05-17.*