1. Low transmission fluid level: Check the transmission fluid level and add more if necessary. Low fluid levels can cause the transmission to slip and overheat, which can damage the transmission.
2. Dirty transmission fluid: Worn out or contaminated transmission fluid can also cause the transmission to slip. Have the transmission fluid flushed and replaced if it is dirty.
3. Faulty transmission solenoid: A faulty transmission solenoid can cause the transmission to shift erratically or slip. Have the transmission solenoid tested and replaced if necessary.
4. Worn out clutch plates: Worn out clutch plates can also cause the transmission to slip. If the clutch plates are worn out, the transmission will need to be rebuilt or replaced.
5. Faulty torque converter: A faulty torque converter can also cause the transmission to slip. If the torque converter is faulty, it will need to be replaced.
It is important to have your vehicle diagnosed by a qualified mechanic to determine the exact cause of the check engine light and transmission slipping. Driving with a slipping transmission can cause further damage to the transmission and other components of your vehicle.