Pistonly: AI Car Diagnostics

Watch manufacturer parameters live: tyre pressure per wheel, transmission oil, EV cells. Modules now carry names instead of addresses.

Pistonly is an AI mechanic. Most OBD2 scanners show a code and leave you to Google it. Pistonly reads the code, checks it against your car's service history, names the likely cause, and tells you whether the car is safe to drive.

THE AI DIAGNOSTICIAN • Add your car by VIN: make, model, generation and engine fill themselves in. • Add codes live from an adapter, or type in a dealer scan: PIWIS, ISTA, VCDS/ODIS, XENTRY, Techstream and more. • The AI works through your service history, ranks the likely causes and gives you an ordered checklist. No history yet? A few questions build one. • Then keep asking. The chat knows this car's codes, its history and its last verdict, so you never explain anything twice.

PARAMETERS THE STANDARD SET NEVER SHOWS Diagnostic profiles for 205 models ship with the app, so Pistonly reads what generic OBD2 never exposes: the pressure in each individual tyre, steering angle, temperatures and voltages from modules the standard mode never talks to. A Cayenne has 28 of these, a RAV4 has 215. Nothing to import. Pro.

WHAT IS THAT LIGHT ON MY DASHBOARD? Pick the symbol or describe it in your own words, before reading any codes and even without an adapter. You get what it means on your car, how urgent it is, and which codes to look for.

CAN I DRIVE IT? Every code carries a plain answer: drive on, drivable but fix it, or better not to drive. Your garage turns it into a health score out of 100.

FREE REPAIRS YOU'RE OWED Pistonly checks the manufacturer's safety recalls for your model and year. A dealer does recall work free of charge, whoever owns the car now, and most owners never find out. Campaigns the regulator marks "do not drive" are flagged in red.

A FULL OBD2 TOOLBOX (with an ELM327 adapter) • Read the whole car in one pass, with a report for your mechanic • Pre-purchase check: codes cleared before a viewing, reset monitors, mileage across modules and open recalls, in one report (Pro) • Control units: Pistonly learns which CAN ID a module answers from instead of assuming one, so modules that used to stay silent now answer, named by what they report. A scan stops on demand and resumes where it left off. • Modules confirmed on cars of the same model show up before you scan • Codes decode their failure type: an open circuit reads differently from an implausible signal • Live sensors, on-board monitors (Mode 06) and I/M readiness • Service functions, odometer cross-check, freeze frame and CSV logging • Drive Mode: a full-screen dashboard for the phone mount, with lap timing

FREE • The AI diagnostician: 3 full analyses every month • Fault codes in plain English, with the can-I-drive verdict • The dashboard light explainer, no adapter needed • Safety recalls, the health score, your garage, service book and interview • Control units, live sensors, Mode 06, readiness, trip computer

PISTONLY PRO • Unlimited AI diagnoses and follow-up chat • Manufacturer parameters and enhanced PIDs • Pre-purchase check and odometer rollback check • Drive Mode and lap timing • Service functions and CSV data logging • More than one car in your garage, each with its own history • Or bring your own Claude or Perplexity API key Monthly, annual, or a one-time lifetime unlock. Cancel anytime.

PRIVATE BY DESIGN No account, no sign-up. Your garage, history and VIN stay on your device, and the VIN is never sent to our servers. Signed in to iCloud? Everything backs up there.

Pistonly is advisory: strong hypotheses and a checklist, not a final verdict.

Works with any ELM327-compatible Bluetooth OBD2 adapter. No adapter? Try the built-in demo.

Marques and logos are trademarks of their owners; Pistonly is not affiliated with any manufacturer. Model profiles are derived from the OBDb community database under CC BY-SA 4.0.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://held-jackrabbit-8cc.notion.site/Pistonly-Privacy-Policy-3a0893c247bf80e7b6d4d17f590bd631