1. Low transmission fluid level: Check the transmission fluid level and add more if necessary.
2. Dirty transmission fluid: The transmission fluid may need to be changed if it is dark or dirty.
3. Damaged shift linkage: The shift linkage may be damaged or loose, preventing the transmission from shifting properly.
4. Faulty transmission solenoid: A faulty transmission solenoid may be causing the transmission to not shift into first gear.
5. Internal transmission damage: If the transmission has internal damage, it may not be able to shift into first gear. This could be caused by worn gears, a broken shift fork, or other mechanical problems.
It is important to have the transmission inspected by a qualified mechanic if the problem persists, as driving with a transmission that is not shifting properly can cause further damage.
