The issue is likely one of the following:
* Park pawl or shift linkage: The most common culprit. The park pawl is a mechanical device that locks the transmission in park. Wear, damage, or a binding linkage can prevent it from releasing. This can be caused by worn-out parts, damage from a previous impact (even a minor one), or simply wear and tear from age and use.
* Shift cable adjustment: The cables that connect the shift lever to the transmission might be improperly adjusted, making it difficult or impossible to shift out of park.
* Transmission issues: Although less likely, internal transmission problems (like low fluid, damaged internals, etc.) could interfere with shifting. This is more serious and usually involves noticeable other symptoms, like difficulty shifting into other gears.
* Steering column lock: Sometimes, a malfunctioning steering column lock will prevent the shift lever from moving. This is usually accompanied by the steering wheel being difficult to turn.
* Broken shifter: Although rare, the shifter itself could be broken or damaged, preventing it from moving properly.
To troubleshoot:
1. Check the shifter: Make sure the shifter isn't somehow physically obstructed.
2. Try jiggling the shifter: Gently rock the shifter back and forth while attempting to move it from park. Sometimes, this can dislodge a stuck pawl.
3. Check the parking brake: Ensure the parking brake is fully released. A partially engaged parking brake can sometimes interfere with shifting out of park.
4. Inspect the shift linkage: If you're comfortable doing so, look under the car and see if there's visible damage or binding in the shift linkage.
5. Check transmission fluid level: Low transmission fluid can cause shifting problems.
If the issue persists after checking these things, you should take your Aveo to a qualified mechanic for diagnosis and repair. Ignoring the problem could lead to further damage to the transmission.
