CrankKey garage tools
Pick the right tool for the job.
Three focused tools for the moments that matter in a DIY diagnosis. Start with the question in front of you, then keep your own evidence and next steps organized.
No account required
Choose a starting point
Your next diagnostic step
Decode the warning
Look up a P-code
Start here when your scan tool gives you a powertrain code and you want a plain-English guide before testing or replacing parts.
Capture the before-state
Record diagnostic evidence
Use this before repairs or clearing codes to preserve freeze-frame details, scan results, and the conditions you observed.
Check the drive-cycle state
Review readiness status
Check this after a battery reset, code clear, or repair when you need to understand which emissions monitors are ready or not ready.
These tools help you organize information and understand common OBD-II terms. They do not replace vehicle-specific service information or a safety inspection.