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Jerry
Jerry, Master Mechanic
Category: Transmissions
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Experience:  30+ years of practical experience in the automotive industry
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What is the effect of a faulty knock sensor in Mercedes S550

Customer Question

What is the effect of a faulty knock sensor in Mercedes S550 W221 2007 model
Submitted: 1 year ago.
Category: Transmissions
Expert:  Jerry replied 1 year ago.
Hello and welcome. My name is ***** ***** you for visiting the site, I will be happy to assist you today.
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If a knock sensor is open it can set a trouble code and allow the engine to have a spark knock. Whereas a shorted knock sensor can retard the timing as well as set a trouble code. That can cause poor performance of the engine's running, (lower power)
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