* Faulty Bendix Gear (Drive Gear): This is the most common cause. The bendix gear is responsible for meshing with the flywheel to crank the engine. If it's sticking or malfunctioning, it won't retract properly after the engine starts, causing the starter to continue spinning and potentially grinding. This is usually accompanied by a grinding noise *after* the engine starts, even if it's subtle.
* Solenoid Problems: The solenoid is an electromagnetic switch that engages the starter motor. If it's faulty, it might not fully disengage, keeping the starter motor energized even after the engine has started. This can also manifest as a clicking noise or a failure to start entirely *before* the engine starts. A sticking solenoid is a likely culprit.
* Starter Motor Issues: While less likely than the bendix gear or solenoid, the starter motor itself could be failing internally. Worn brushes or internal shorting could prevent proper disengagement.
* Wiring Problems: A short circuit or faulty wiring in the starter circuit could prevent the solenoid from disengaging correctly.
* Ignition Switch Malfunction: Though less probable, a failing ignition switch could be sending incorrect signals to the starter solenoid.
Troubleshooting Steps (Proceed with caution - working on car parts involves risk of injury):
1. Listen Carefully: Does it make a grinding noise after the engine starts? This strongly suggests a bendix gear problem.
2. Check the Battery: A weak battery can sometimes cause the starter to stick. Make sure your battery is properly charged.
3. Visual Inspection: If you're comfortable working under the hood, visually inspect the starter motor for any obvious damage or loose connections.
4. Professional Help: Unless you have experience working on car starters, it's best to take your Sable to a qualified mechanic. Replacing the starter or related components is often better left to a professional, as incorrectly fixing it can damage other parts or lead to injury.
Don't continue to crank the engine if you hear grinding. This will quickly damage the starter and potentially the flywheel.
The cost of repair will depend on the actual problem. A faulty bendix gear might be a relatively inexpensive fix, while a completely failed starter motor could be more costly.
