You get what you pay for.
OBD scanners can be purchased in many of the same places as other electronics. Walmart, Office Depot, Target, and Sears all have them. CDW is a good online site.
What does obd code P0740 mean
OBD 1 ANSWER Some vehicle makes started switching to OBDII before 1996. In the driverside door panel it will tell you if it is OBDII compliant. Most likely not. Try doing a search on Ebay I am sure there are OBD scanners on there for you make and model
Between the motor and the ecu, a square box (probably with 12 pins and require a adapter/converter to fit into modern obd scanners)
This code is for evaporation purge performance surge check. It is best to take this into a mechanic and have them fix it unless you are experienced yourself.
It is usually found unter the driver side dash board or uner the hood.
If your car was manufactured before 1996, an OBD I scanner is required. If your car was manufactured 1996 or after, it requires an OBD II scanner. Scanners/code readers can be purchased at any auto parts store for between $50 and $300. The professional type scanners/programmers used at dealerships and such cost several thousand dollars and generally require software modules as well for the particular brand of car in question.
The present code will have to cleared or erased using a OBD-II code scanner. If the problem hasn't been fixed though then the light will come back on. You can buy one of the scanners from any auto parts store now. Some of them are less than a 100 bucks. Good luck.
plug a obd 2 code reader into your car and activate it.
Most diagnostic scanners with Obd 2 will display on screen the problem, older Obd 1 codes can be found in the cars repair manual or in the guide that usually comes with the scanner.
OBD I, but for the most part, you can use OBD II
Usually the loose gas cap problem code will clear itself after starting the engine a few times once the problem is solved. If you want to use an OBDII code scanner, most of the newer model scanners will allow you to clear codes as well.