Explore the data
behind a warning light.
What gets recorded when a warning light comes on? Open the sample cards to compare the moment a code was recorded with a later reading.
This is a simulated vehicle example. This page does not connect to a car or scanner, take live readings, or run an AI diagnosis.
Tap a card to explore
Warning record P0420Stored trouble code
The simulated vehicle has one stored P0420 and its warning light is on. There are no pending codes.
A code is a starting point for investigation. It does not, by itself, tell you which part to replace.
When it was recorded 98 km/hThe vehicle was moving
Engine speed was 2,210 rpm and coolant temperature was 88°C. This snapshot from when the code was recorded is called a freeze frame.
Current sample reading 0 km/hThe vehicle is stationary
Engine speed is 740 rpm and coolant temperature is 89°C. Current readings can differ from the conditions recorded with the code.
Ask your AI about this example
Copy the text below and paste it into the AI you normally use. Nothing is sent automatically from this page.
Responses vary by AI. If you use a real vehicle's details with an external service, leave out VINs and personal information.
What can you do next?
Bring the recorded conditions and current readings to a mechanic, rather than choosing a repair from the code alone. Ask a qualified professional about safety-critical work.