How to use check engine light code reader get and clear Check Engine Light Codes
To clear the check engine light, you do not need to go to the dealer and pay upwards of $100 or more to "look" at your car. The tool you need is called a OBD2 (Onboard Diagnostics 2) reader. OBD2 is in all cars made since 1996. Depending on the reason for the check engine light, you may be able to take care of problems later (eg. emissions) instead of sooner (eg. oil leak, tranny problems, engine problems). Use the check engine code reader to clear the check engine light.
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Locate the diagnostic link connector in the vehicle. Vehicles manufactured with OBD (prior to 1996) will have the connector in the engine compartment (with the word "diagnostics" stamped on the cover). Refer to the owner's manual for the correct location. OBD diagnostic connectors were manufactured differently by various companies, so to connect to the link would require a plug specific for that make. OBD II vehicles (1996 and up) will have the DLCs located in the cabin of the vehicle, most likely under the driver's side dash. There is no universal position to place the DLC under the dashboard, and some manufacturers, like Honda, placed them behind the ashtray. Again, refer to the owner's manual for the correct location. OBD II DLCs are all universally shaped, which means any OBD II code reader or scan tool can plug into it no matter what company manufactured the vehicle.

Look at your service manual for your car or go online to look up OBD2 codes for your car. Professional check engine light code reader will display the meaning of the code but most consumer grade check engine light code reader will only give you the code itself. This means you have to look up the meaning of the codes yourself on the internet.

Once you are satisfied with the result of the code, you can clear it by following the directions on your check engine light code reader to clear the check engine light. Note that all codes are erased when you do this. Do not clear the code if you intend to have an auto mechanic fix your car.
 


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