Free Tools
Diagnose before you dial.
Three free tools to help you figure out what's going on before you spend a dime. No sign-up, no email gate — just answers. When you're ready, we'll bring the scanner to you.
01Pick a tool
Diagnose My Car
Pick what's happening, answer a couple of questions, and we'll narrow down the likely cause — plus how urgent it is.
- Symptom wizard
- Likely causes
- Urgency rating
OBD-II Code Library
Pulled a code like P0301 at the parts store? Look it up here for a plain-English meaning and the usual suspects.
- Searchable codes
- Plain-English meanings
- Possible causes
Warning Light Library
Tap any dashboard light to see what it means, how serious it is, and whether you can keep driving.
- Every common light
- Severity levels
- Safe-to-drive calls
Still stuck?
We bring the scanner to you.
The tools point you in the right direction. A Tate Mobile diagnostic pins it down with live data — in your driveway.