CarMD: Check the health of your car
The ODB standard defines a set of standard codes that helps identifying the problem.
It is not a replacement for a skilled technician but it can give you peace of mind:
- Examine a used car before buying: The green, yellow and red lights on the CarMD tester can tell you if the used car you're considering is jewel, a possible lemon, or a big red flag.
- Give your vehicle a clean bill of health before road trips : Again, watch the lights. Green = go, Yellow = proceed with caution, Red = consult your mechanic.
- Pre-”smog” test your car: Yellow or red lights mean you may not pass a state emissions test. Be sure to consult your mechanic.
- Get a second opinion on your mechanic's report: Take your diagnostic report to your mechanic to help ensure they have located the source of your car's pain and are planning to send you a fair bill.