Symptoms of a faulty automatic transmission selector:
1. Difficulty shifting gears:
* The selector sticks or resists movement when changing gears.
* There are delays or jerks when switching.
* The car may be stuck in one gear or not shift at all.
2. Incorrect transmission indicator readings:
*The gear indicator on the instrument panel shows the wrong gear or “P” even if the selector is in a different position.
* Inconsistency between selector lever position and gear indicator readings.
3. Gearbox errors:
* The transmission fault light on the instrument panel comes on.
* Error codes read from the OBD scanner indicate a malfunction of the automatic transmission selector.
4. The engine cannot be started:
* In some cars with an immobilizer system, a faulty automatic transmission selector may prevent the engine from starting.
* The vehicle may not start in certain selector positions.
5. Extraneous noise:
* Grinding or clicking noise when shifting gears.
* Humming or vibration when the selector is in the “P” or “N” position.
6. Failure of the ignition switch:
* A faulty automatic transmission selector can lead to failure of the ignition switch, as it is connected to the ignition switch interlock system.
* Difficulty turning the ignition on or off.
7. Inaccurate adjustment of the gear shift cable:
* Incorrect shift cable adjustment can simulate a faulty automatic transmission selector.
* Difficulty shifting gears due to loose or too tight cables.
8. Electrical problems:
* Damage to the wiring or connectors associated with the automatic transmission selector may cause it to malfunction.
*A short circuit or open circuit may cause intermittent or permanent problems.
9. Wear or failure of mechanical components:
* Over time, the mechanical components in the automatic transmission selector may wear out or break.
*Damaged springs, clamps or levers may prevent the selector from operating correctly.