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the motor could pre-detonate or "knock"

that can cause damage

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17y ago

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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.


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 can happen if you install a different knock sensor than called for?

what will happen if you install a knock sensor that isn't called for that make & madel


When the knock sensor is disconnected what happen to the car?

Nothing will happen to the car if you disconnect the knock sensor. It just will not detect a problem if there happens to be one.


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.