OBD LLM Diagnostics

obdllm

About this app

Put your car health in your pocket. Car Diagnostics connects to ELM327 adapters via Bluetooth or WiFi and turns your Android phone or tablet into a proper diagnostic tool — the kind mechanics charge you to use.

LIVE SENSOR DATA
Everything your car is doing, in real-time. RPM, speed, coolant temperature, throttle position, engine load, MAF, fuel level, battery voltage, intake temperature. All of it, streaming live to your screen.

FULL DIAGNOSTICS SCAN
Read what your car's computer actually knows. Car Diagnostics pulls fault codes (DTCs), pending codes, and permanent codes, along with freeze frame data, check engine light status, and the full list of supported sensors. No guessing, no vague warning lights.

AI ASSISTANT
Got a cryptic error code? The built-in AI explains each one in plain language and tells you what to do about it — whether that's a simple fix or a trip to the shop. Available on paid plans.

SERVICE HISTORY
Log your maintenance as you go: oil changes, brake pads, filters, anything. One place for the full history of your car's upkeep.

MY CARS
Managing more than one vehicle? Add each one with its VIN and switch between them in seconds. Works for personal use or small fleets.

DEMO MODE
Not ready to buy an adapter yet? Demo mode lets you explore every feature with simulated data. No adapter, no commitment.

Works great on phones and tablets — the tablet layout uses a sidebar so everything stays comfortable on a larger screen. No account required to get started; just install and go with Guest mode.

Choose the plan that fits: Personal for everyday drivers, Pro for the serious diagnostics, Fleet for managing multiple vehicles professionally.