Check Engine Light On? An Evidence-Led OBD-II Workflow
Read status, codes, freeze-frame, readiness, and live data before clearing anything—then test the system named by the code instead of ordering the named part.
Tag diagnostics
Oil Leak or Oil Consumption? Measure the Loss Before Choosing a Repair
Standardize dipstick checks, inspect for hidden external leakage, and distinguish oil burning or fluid mixing without relying on puddles or exhaust color alone.