What Causes Idle Vibration in Audi A6L 2.0T?

1 Answers
DelAmelia
07/29/25 9:20pm
Audi A6L 2.0T idle vibration may be caused by a dirty air filter, short circuit in high-voltage lines, worn-out spark plugs, etc. Specific reasons are as follows: Dirty Air Filter: The air filter should generally be replaced every 10,000 kilometers. If not replaced in time, insufficient air intake can lead to low idle speed, causing engine vibration. Simply replacing the filter element can resolve this issue. Short Circuit in High-Voltage Lines: A short circuit in high-voltage lines refers to a break in the conductor core, which can affect ignition and cause engine vibration. Use a multimeter to measure resistance and replace the line with significantly higher resistance (several times higher than normal). Worn-Out Spark Plugs: After 30,000-40,000 kilometers, the ignition efficiency of spark plugs noticeably decreases, which can affect ignition. This is the most common fault, and replacing all spark plugs can solve the problem.
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