FlatDiag turns cryptic fault codes and coding usually left to dealers into clear, tap to fix answers, right from your iPhone, your Mac, or the car's CarPlay screen. Plug in an OBDLink adapter and read, clear, and customize your car like the pros, without the $10,000 tool.
Built for the Porsches people actually drive
Coverage varies by model, year and equipment. A built in simulator lets you preview the full app before you buy anything.
FlatDiag reads and clears fault codes on every generation below. Coding and live data depend on the car. Only the 981 has been confirmed on a real car so far; the rest are built from the factory diagnostic data and tested against the built in simulator.
| Porsche | Chassis | Connects via | What works today |
|---|---|---|---|
| Boxster, Cayman, 911 | 981, 991 | OBDLink (Bluetooth) | Scan, fault codes, live data, coding, service |
| 718 Boxster, 718 Cayman | 982 | OBDLink (Bluetooth) | Scan, fault codes, live data, coding |
| 911, Boxster, Cayman | 997, 987 | OBDLink (Bluetooth) | Scan and fault codes. Coding and live data coming soon |
| Cayenne | 958 | OBDLink (Bluetooth) | Scan, fault codes, live data, coding |
| Cayenne | 9YA | ENET (Ethernet) | Scan, fault codes, live data |
| Panamera | 970 | OBDLink (Bluetooth) | Scan, fault codes, live data, coding |
| Panamera | 971, 2024+ | ENET (Ethernet) | Scan, fault codes, live data |
| Macan | 95B | OBDLink (Bluetooth) | Scan, fault codes, live data, coding |
| 911 | 992 | ENET (Ethernet) | Scan, fault codes, live data |
| Taycan | J1 | ENET (Ethernet) | Scan, fault codes, live data |
| 918 Spyder | 918 | OBDLink (Bluetooth) | Scan, fault codes, live data, coding |
See the full per model breakdown on the supported vehicles pages.
Real screens from the app. Look around before you connect anything.
No hex. No guesswork. Just clear answers and one tap actions for your car.
FlatDiag reads every fitted control unit and explains each fault in one clear sentence, grouped by system and ranked by severity. Fault codes are shown with their exact code and a clear description, backed by an offline library of 179,000+ Porsche codes, so you stop Googling P codes.
Unlock factory options and personalize your car: comfort, lighting, gauges, and more. Browse coding by module with friendly names instead of raw values, and apply changes in a batch.
Every coding change is automatically backed up first. Changed your mind? Restore the original in one press. FlatDiag confirms each write and reads it back to verify it took.
Watch live engine values like RPM, temperatures, speed, and load in a clean tile grid, or put them on the car's screen with CarPlay. Flip between metric and imperial with a single tap.
One tap finds every control unit in your car: engine, transmission, ABS/PSM, airbags, and even the seat, door, and body modules that live on a separate network and that most tools miss. Search the list by name, and clear a code to have FlatDiag read it again automatically.
Run guided service procedures with step by step prompts, like seat calibration, safely gated behind a battery check and your confirmation. More routines are being added and validated on real cars.
Pop an OBDLink CX adapter into your Porsche's OBD2 port, under the dash on the driver's side. No tools, no wiring.
Open FlatDiag and pair over Bluetooth. Your car is identified automatically by its VIN, so there are no setup screens to wade through.
Scan for faults, clear what you've fixed, watch live data, apply coding, and run guided service routines, all in plain English and all from the driver's seat.
Changing how your car behaves should never be a leap of faith. FlatDiag is built so that every write is deliberate, reversible, and verified.
No laptop, no dealer appointment, no subscription. FlatDiag runs entirely on your phone.
For most Porsches: a compact Bluetooth LE dongle that connects fast and stays connected. It plugs into your OBD2 port and talks to FlatDiag wirelessly.
Buy on AmazonThe newest Porsches, like the 992 and Taycan and other DoIP cars, connect over automotive Ethernet. This ENET adapter links them to FlatDiag.
Buy on AmazonFlatDiag is a native app for iPhone, with the same tool on Mac and a live dashboard on CarPlay. Bring the devices you already own, and the whole thing fits in your pocket.
No cloud account, no monthly fee. Your scans and coding backups stay on your device, private to you.
As an Amazon Associate, FlatDiag earns from qualifying purchases. Adapter links on this site are affiliate links; if you buy through one, FlatDiag may earn a commission at no extra cost to you. See our disclosures.
No. FlatDiag is an independent app and is not affiliated with, endorsed by, or sponsored by Porsche. "Porsche," the Porsche model names, and Porsche feature names (such as PASM, PDCC, and Sport Chrono) are trademarks of their owner; we use them only to describe compatibility.
FlatDiag is built to make coding safe and reversible: every change is backed up first, you confirm each write, and the result is read back to verify. Stick to documented options, keep battery voltage healthy, and you can always restore the original in one press.
An iPhone or Mac you already own and an OBDLink CX Bluetooth adapter. The newest Porsches that use DoIP (the 992, Taycan, and other Ethernet cars) need an ENET adapter instead. No laptop, cables, or subscription.
FlatDiag spans Porsche's KWP2000, UDS, and DoIP generations: the 911 (997, 991, 992), Boxster & Cayman (987, 981), Panamera (970, 971), Cayenne (958, 9YA), Macan (95B), Taycan (J1), and 918 Spyder. What works varies by generation, so see the coverage table above.
Full coding is available on the UDS generation cars: the 981, 982 and 991, the 958 Cayenne, the 95B Macan, the 970 Panamera, and the 918 Spyder. The newest DoIP cars (992, Taycan, 9YA Cayenne, 971 Panamera) support scanning, fault codes, and live data. Coding on those cars reaches only a couple of modules today, such as the sound system and the antenna module, and is still being expanded. The 997 and 987 read and clear fault codes today, and coding and live data for those cars are coming soon. Only the 981 has been validated on a real car so far; every other line is built from the factory diagnostic data and exercised against a built in simulator.
Yes. FlatDiag is in TestFlight beta and actively improving. Request access and we'll send you a beta invite, plus news when it reaches the App Store. Prefer to look first? A built in simulator lets you explore the whole app with no car connected.
Both. FlatDiag is one app that runs on iPhone and Mac, and it shows your live data on the car's CarPlay screen while you drive.
Yes. Diagnostics and coding run on your own device, and your backups stay there. There's no account. The app contacts FlatDiag's key server only to confirm it is a genuine copy and to unlock its built in data; your vehicle's data is never uploaded.
FlatDiag is in TestFlight beta now. Drop your email for a beta invite and launch news. No spam, just FlatDiag.
We'll only email you about FlatDiag. Prefer email? nick@flatdiag.com