What Causes Severe Idle Vibration in Camry Without Fault Codes?

[MacValerie]

Camry without fault codes but experiencing severe idle vibration may have the following causes: 1. Severe engine carbon buildup: The most common cause of car vibration is excessively dirty throttle body or excessive carbon deposits in fuel injectors. When there's too much carbon buildup inside the engine, the gasoline sprayed by cold start injectors gets largely absorbed by the carbon deposits. 2. Engine misfire: This mainly refers to one or more cylinders not working properly, manifested as: intermittent exhaust gas flow with noticeable pauses, severe exhaust pipe vibration, clearly perceptible engine shaking, sometimes accompanied by "popping" sounds. This condition is often related to ignition coil failures.