ChatOBDJoin the waitlist

Private beta for iPhone

Understand your car. Know what to do next.

Your car is already telling you what's wrong.
ChatOBD translates it into plain language.

ChatOBD vehicle card for a 2020 Volkswagen Tiguan showing vehicle details, health, codes, and recalls

Real questions

From “what’s wrong?”
to what’s next.

Pick a question to follow the conversation.

Choose a question to read ChatOBD’s example answer
You asked

My check engine light just came on. Is it safe to keep driving?

ChatOBD2017 Honda Civic
Usually yes, if it's steady

What it means

A steady light is a logged fault. A flashing one is an active misfire that can damage the catalytic converter.

What to do next

  1. If it's flashing, pull over and stop the engine.
  2. Scan the code in ChatOBD to see what tripped it.
Based onLight statusStored codes
You asked

What does P0420 actually mean, and how urgent is it?

ChatOBD2015 Ford F-150
Not urgent, don't ignore it

What it means

The catalytic converter isn't cleaning exhaust as well as it should. An exhaust leak or a lazy O2 sensor can trigger the same code.

What to do next

  1. Compare upstream and downstream O2 readings in Live monitor.
  2. Book an inspection within a few weeks.
Based onP0420O2 sensors
You asked

The shop quoted me $900 for a misfire. Is that reasonable?

ChatOBD2019 Volkswagen Tiguan
Depends what they're replacing

What it means

A single-cylinder misfire is usually a plug or coil. A full ignition service is a different job, and the code tells you which one you need.

What to do next

  1. Ask which cylinder and which part the quote covers.
  2. Get a second quote if it covers all four cylinders.
Based onP0301Misfire counters
You asked

Why is my coolant temperature climbing in traffic?

ChatOBD2014 BMW 328i
Check soon, before a hot day

What it means

At a standstill the radiator depends on the fan. A climb that settles once you move points to the fan, low coolant, or a sticking thermostat.

What to do next

  1. Check the coolant level when the engine is cold.
  2. Watch coolant temperature live on your next drive.
Based onCoolant tempFan status

How it works

Three steps from warning light to answer.

  1. 1

    Plug in an adapter

    Any Bluetooth OBD-II adapter fits the port under your dash. Most cars built since 1996 have one.

  2. 2

    Connect in the app

    ChatOBD pairs with the adapter and reads your car's trouble codes and live sensors in seconds.

  3. 3

    Ask anything

    Get a plain-language read on what a light means, how urgent it is, and what to check first.

One connection. More understanding.

Your car. Connected to
a team of experts.

A Bluetooth OBD-II adapter brings your car’s data into ChatOBD.
Specialist agents help you make sense of it.

Compact Bluetooth OBD-II concept adapter with a wide graphite body, integrated rear connector, and fine orange light trim

Concept adapter shown. Use a compatible iPhone Bluetooth OBD-II adapter.
You can also use ChatOBD without one.

ChatOBD Assistant

Talk to your car like you'd talk to a mechanic you trust.

Ask a question, snap a photo of the dashboard, or record the noise your engine is making. A team of specialised agents works out what it means and answers in plain language.

Join the waitlistPrivate beta · iPhone

Speak naturally

No code lookups, no forum threads. Describe what you're seeing or hearing and get an answer that fits your car.

Show it, don't describe it

Photos of a warning light, a recording of a rattle, or a code straight from the adapter. Every input lands in the same conversation.

  • Diagnostics agentReads codes and freeze-frame data, ranks them by urgency.
  • Live data agentWatches sensors while you drive and flags what drifts.
  • Car agentKeeps your car's profile, history, and current context available to every specialist.
  • Repair advisorExplains what a fix involves and what to ask the shop.

What it does

Everything you need to understand your car.

ChatOBD combines real diagnostic data from your car with a plain-language assistant, so you know what's happening and what to do about it.

P0301Attention soon
Cylinder 1 misfire detected

Usually a worn spark plug or ignition coil.

Can I drive?
Short distances
Avoid
Hard acceleration
P0456Small EVAP system leak
Low priority

Warning lights, translated

Understand what a code means, how urgent it is, and what to check before you book a repair.

94/100Vehicle health
Coolant
90 °C
Engine load
21%
Fuel level
74%
Battery
14.2 V

See what your engine is doing now

Live readings from your car's sensors, so you can watch a problem develop instead of guessing.

  1. Diagnostic scanNo active codes
  2. Coolant checkedNormal range
  3. Question answeredBattery health
  4. Drive reviewed42 km, no faults

The full story stays with the right car

Scans, drives, and questions are kept per vehicle, so nothing gets lost between visits to the shop.

FAQ

Good questions.

Do I need extra hardware?

No. ChatOBD works without an adapter. A Bluetooth OBD-II adapter adds direct vehicle telemetry and improves automatic trip detection accuracy, so it is recommended for the complete experience.

Which cars are supported?

Any car with an OBD-II port. That covers nearly all gasoline cars sold in the US since 1996, and most cars sold in Europe since the early 2000s.

Is the beta free?

Beta access through TestFlight is free. After confirming your address, the waitlist sends one email when invitations open.

Is ChatOBD available for Android?

Not yet. The private beta is iPhone only.

Early access for iPhone

Be first to understand your car.

Confirm your address, then get one email when private beta access opens.

Join the waitlistHow it works