- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
If you are referring to the car's computer and the light coming on is the 'check engine' light, then you need to find out WHY the light is coming on. If you don't already have one, buy a basic OBD reader (+/- $20 on Amazon), plug it into the OBD port (usually under the dash near the hood release lever) and see what the OBD error code registers. You can then decide what to do. My unit also has the facility to delete the error codes, but when the computer goes through another check cycle, the light will come back on.
If it is OBD-1 you can use a paper clip to jumper two terminals in the test plug under the dash, and then watch the check engine light flash. If it is OBD-2 you need a code reader or scanner. Most auto parts stores will read OBD-2 systems for free in hopes of selling you some parts.
That's easy. Just get an OBD-II compliant scanner. It will support 1996 and up vehicles that were required by law to have an OBD-II connector below the steering wheel under the dash board, in many cases.
Actron makes a good one for under $100. But other brands can be had for under $100 from Sears or Walmart.
Or, you could go to Autozone or Advance Auto Parts, for instance, and get it scanned for free.
Do you have a service engine soon light on?
Good luck on diagnosing and repairing the problem.