Addressing the Stuck Key First:
Before attempting anything else, you need to get the key out. Here are some common causes and solutions:
* Shift Lever: Make absolutely sure the gear selector is in "Park" (or neutral if it's a manual transmission). Sometimes a slightly misaligned shifter can prevent key removal. Try gently rocking the shifter back and forth while trying the key.
* Steering Wheel Lock: If the steering wheel is locked, gently try to turn it back and forth while attempting to remove the key. Too much force can damage the steering column.
* Ignition Switch: The ignition switch itself might be faulty. This is a more serious problem requiring professional attention. A mechanic can diagnose and replace the switch.
* Electrical Fault: Sometimes a short circuit or electrical problem can prevent the key from releasing. Check the car's battery and electrical connections.
* Broken Key: The key itself may be broken or worn.
Once you get the key out, then you can address any potential computer relearn procedures, but getting the key out is the priority.
Possible "Relearn" Scenarios (after you've removed the key):
If you're experiencing issues like rough idling, stalling, or poor performance *after* a battery disconnection or replacement (which would be the most likely scenario requiring a relearn), it's possible the car needs a throttle relearn or a PCM (Powertrain Control Module) relearn. Procedures vary slightly depending on the specific engine and transmission. Some models require a specific diagnostic tool to perform these procedures.
For a 2002 Malibu, searching online for "2002 Chevy Malibu PCM relearn" or "2002 Chevy Malibu throttle body relearn" will likely yield more specific instructions. You might find detailed procedures on automotive forums.
Important Note: Do not attempt to bypass or force the ignition system. This can cause damage and further complicate the issue. If you are unable to get the key out or resolve the underlying issue, consult a qualified mechanic. They have the tools and expertise to diagnose and fix the problem safely.
