What Causes Steering Wheel Vibration at Idle?

[LeAutumn]

Here are the reasons for steering wheel vibration at idle: 1. Ignition system issues causing one or more cylinders to misfire, which can also lead to idle vibration. Check the spark plugs. If there are cracks in the ceramic part of the spark plugs, also inspect whether the ignition module is functioning properly. Solution: Check if the spark plugs are excessively carbon-fouled and replace them if necessary. 2. Severe engine carbon buildup. The most common cause is a dirty or faulty throttle body, which can lead to idle vibration. The primary reason for a dirty throttle body is carbon buildup at the junction between the throttle valve shaft and the throttle body, resulting in imprecise throttle opening and causing idle vibration. Therefore, we can first clean the throttle body. If the vibration stops after cleaning, it indicates that the issue was caused by a dirty throttle body. If the vibration persists after cleaning, it may suggest a faulty throttle body assembly, which needs replacement. Note: Since modern vehicles use electronic throttle bodies, the idle speed needs to be readjusted after cleaning the throttle body. Solution: Clean the fuel system and check if the idle air control valve has carbon buildup, which should be cleaned.