2. Diagnose the cause of the check engine light. If the check engine light has reappeared after the transmission was fixed, it is important to have the cause of the light diagnosed by a qualified mechanic. This may involve reading the vehicle's trouble codes, which can help identify the source of the problem.
3. Have the necessary repairs performed. Once the cause of the check engine light has been diagnosed, you will need to have the necessary repairs performed in order to get the light to turn off. This may involve replacing a faulty sensor, fixing a vacuum leak, or performing other repairs.
4. Return to the emissions testing center. Once the necessary repairs have been performed, you will need to take your vehicle back to the emissions testing center for a final inspection. If the vehicle passes the emissions test, you will be issued a new emissions certificate.
Here are some additional tips that may be helpful:
* Keep all of your emissions-related documentation, including your emissions certificates and repair receipts, in a safe place.
* If you have any questions about your vehicle's emissions, do not hesitate to contact your local emissions testing center or a qualified mechanic.
