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it could cause your truck to run in limp mode due to the truck thinking it has a misfire or it could in some cases cause poor fuel economy and plug up your catalytic converters

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14y ago

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Will it hurt engine to drive with bad knock sensor?

Yes it can hurt your engine to drive with a bad knock sensor. The knock sensor should be replaced as soon as possible.


What happens if you drive the vehicle with a bad knock sensor?

If you run your rig with a bad knock sensor the computer will not be able to tell if or when your engine starts to knock (such as a rod knocking). That is if it isn't already cause the sensor is there for insurance. Make sure the sensor is bad and if so have it replaced asap. It is an expensive job cause you have to remove the intake to get to them (some engines have two under the intake). willyray3


What does a car do when the knock sensor is bad?

The knock sensor retards the engine timing when there is a knock or ping detected. This will make the car a little sluggish. It is rare that the knock sensor goes bad.


Can a knock sensor correct itself?

If the sensor it'self is bad then NO.


Does a knock sensor ECM error mean that sensor is bad or that the sensor is just reporting a knock in the engine?

The sensor is bad. A properly-functioning knock sensor allows the ECM to advance timing until it senses a knock. It then retards timing until the knock just barely goes away allowing for optimal gas mileage.


If your knock sensor is bad what will your car do?

Ping.


Can a bad knock sensor be responsible for rough shifting?

No, the knock sensor only retards the timing when it detects the engine pinging.


Will a bad knock sensor make your vehicle cut off?

if a knock gos bad can your car go off


Does the engine knock with a bad knock sensor?

NO it will not. If you have a knocking sound then you have trouble inside of the engine.


Does the engine on a 2003 impala knock in the top of the motor if the knock sensor is bad?

The knock sensor just advances and retards the engine timing only. If there is a noise in the engine then you have engine are valve train problems. The knock sensor will not make the engine knock.


Will a bad knock sensor prevent an engine from shifting?

A bad knock sensor would illuminate the check engine light and allow the engine to ping (spark knock). The engine doesn't shift, the transmission shifts.


Why do you still get a bad code for the knock sensor after you put a new knock sensor on your 1999 mercury villager but still get a bad code from the computer?

Because there is nothing wrong with it. This is a common code that can relate to a number of components. The knock sensor itself is rarely the problem.

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