What Happens When Your Audi Q7 Knock Sensor Goes Bad?
What’s a knock sensor and how does it work?
A knock sensor monitors engine vibration and the overall combustion process.
It measures the frequency at which your car engine is vibrating.
You can find it outside the engine block.
The data provided by this sensor helps the ECU to regulate the ignition timing.
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
Audi Q7 knock sensor failure: Causes
Following reasons are primarily responsible for knock sensor failure in Audi Q7: Power surge Electrical short circuit Broken wires Corrosion Physical damage
Audi Q7 knock sensor failure: Symptom
Here’s what would happen if your Audi Q7 knock sensor goes bad:-
Noisy Engine
It is one of the most common signs of a bad knock sensor in your Audi Q7.
Besides, you might also notice engine vibration.
Check Engine Light Is Flashing
A faulty knock sensor can trigger the check engine light on the dash of your Audi Q7.
When the ECU finds out about the defects in the knock sensor, it would throw an error code.
Diagnostic trouble code for a bad knock sensor is P0325.
Bad Engine Performance
The ECU uses the knock sensor data to regulate the ignition timing.
Inaccurate data provided by a defective knock sensor makes the spark plug fire inappropriately.
It can result in incomplete combustion of air-fuel mixture which ultimately affects the engine operation.
Engine Misfire
This may be sound odd, but having a bad knock sensor can cause engine misfire in your Audi Q7. So, consider installing new ones.
Concluding Remarks
The engine control module uses the data provided by the knock sensor to control ignition timing.
However, a bad knock sensor can hinder the ECU’s ability to do its job properly.
As a result of that, the engine might not perform at its full pace.
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