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Why wont your 2000 Hyundai sonata shift past second gear and then the check engine light comes on?

Possible Causes:

- Low transmission fluid: Check the transmission fluid level and add more if necessary.

- Dirty transmission fluid: The transmission fluid may be dirty and need to be changed.

- Faulty shift solenoid: The shift solenoid may be faulty and need to be replaced.

- Faulty transmission control module (TCM): The TCM may be faulty and need to be reprogrammed or replaced.

- Mechanical failure: There may be a mechanical failure within the transmission, such as a broken gear or worn-out clutch.

Check Engine Light:

- The check engine light may be on due to a transmission-related problem, such as a faulty sensor or a malfunctioning component.

Recommendation:

- It is recommended that you take your vehicle to a qualified mechanic for diagnosis and repair of the transmission problem. The mechanic will be able to identify the cause of the problem and perform the necessary repairs.