Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
System Readiness Test Access: Description
All OBD-II scan tools must display System Readiness Test (SRT). SRT will display supported monitors on vehicle and status of all tests, complete or not complete, at that time. If not complete, scan tool will display which tests are not complete. Fuel, misfire and comprehensive components are continuous tests and won't display complete or not complete. To enter SRT, turn ignition off. Ensure test equipment is properly attached. Program scan tool using the following steps:
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.