1. Engine Misfire: Faulty spark plugs, ignition coils, or fuel injectors can cause the engine to misfire, leading to vibrations at idle.
2. Vacuum Leak: A vacuum leak in the engine bay can create a lean air-fuel mixture, resulting in rough idling and shaking.
3. Idle Air Control (IAC) Valve Issues: A faulty or dirty IAC valve can affect the engine's ability to maintain a steady idle, causing shaking.
Transmission Problems:
1. Torque Converter Issues: A faulty or worn-out torque converter can cause vibrations when the vehicle is in gear but idling.
2. Transmission Fluid Issues: Low or old transmission fluid can lead to poor engagement and increased vibrations.
Driveline Issues:
1. Driveline Imbalance: Worn or damaged CV joints, driveshafts, or universal joints can cause the car to shake at a stop due to imbalances.
2. Wheel Alignment Issues: Improperly aligned wheels can cause vibrations that become more noticeable at lower speeds.
Suspension Problems:
1. Worn Suspension Components: Worn suspension components like tie rods, control arms, or ball joints can cause the car to shake at idle.
2. Tire Imbalance: Unbalanced tires can create vibrations that are most noticeable at lower speeds.
Check Engine Light:
If the check engine light is illuminated, it could indicate an underlying engine problem that is causing the shaking.
