What Happens When your Audi Q7 Knock Sensor Goes Bad

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What Happens When Your Audi Q7 Knock Sensor Goes
Bad?
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Whats a knock sensor and how does it work?
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A knock sensor monitors engine vibration and the
overall combustion process.
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It measures the frequency at which your car
engine is vibrating.
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You can find it outside the engine block.
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The data provided by this sensor helps the ECU to
regulate the ignition timing.
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In addition to that, a knock sensor helps the ECU
in the following ways-

• Discover pre-ignition
• Prevent engine misfire
• Manage ignition timing
• Make the engine more efficient
• Improve gas mileage

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Audi Q7 knock sensor failure Causes
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Following reasons are primarily responsible for
knock sensor failure in Audi Q7-

• Power surge
• Electrical short circuit
• Broken wires
• Corrosion
• Physical damage

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Audi Q7 knock sensor failure Symptom
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Heres what would happen if your Audi Q7 knock
sensor goes bad-
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Noisy Engine
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It is one of the most common signs of a bad knock
sensor in your Audi Q7.
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Besides, you might also notice engine vibration.
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Check Engine Light Is Flashing
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A faulty knock sensor can trigger the check
engine light on the dash of your Audi Q7.
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When the ECU finds out about the defects in the
knock sensor, it would throw an error code.
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Diagnostic trouble code for a bad knock sensor is
P0325.
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Bad Engine Performance
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The ECU uses the knock sensor data to regulate
the ignition timing.
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Inaccurate data provided by a defective knock
sensor makes the spark plug fire inappropriately.
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It can result in incomplete combustion of
air-fuel mixture which ultimately affects the
engine operation.
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Engine Misfire
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This may be sound odd, but having a bad knock
sensor can cause engine misfire in your Audi Q7.
So, consider installing new ones.
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Concluding Remarks
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The engine control module uses the data provided
by the knock sensor to control ignition timing.
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However, a bad knock sensor can hinder the ECUs
ability to do its job properly.
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As a result of that, the engine might not perform
at its full pace.
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