What does the ECU adjust when the knock sensor signals a knock?
What does the ECU adjust when the knock sensor signals a knock?
The knock sensor picks up vibration and sound coming from the engine block, turns it into an electronic signal and sends that signal to the engine control unit (ECU). It can also cause a check-engine light (CEL) to appear or potentially shut down part of the motor in order to save itself from further damage.
Are there any knock sensor problems on GM trucks?
Knock Sensor Problems on GM Vehicles. Knock sensor problems are common on 1999-2007 Chevy Silverado, Express Van, Tahoe and Suburban trucks. Of course, this means that the GMC Sierra and Yukon of the same years have the same issues.
Can a bad knock sensor cause a check engine light to flash?
Usually a bad knock sensor will trigger the “check engine” light to flash on your vehicle’s dashboard. Sometimes, using cheap gasoline causes detonation and triggers the power train module — the engine’s main control board — to wrongly diagnose the knock sensor and send a false malfunction message via a check engine light.
Why does my knock sensor keep collecting water?
This location can collect water over time under the right circumstances. This wouldn’t be an issue if the knock sensor harness stayed pliable and sealed the connection.Again, because of the location, these rubber boots that seal the connector deteriorate and shrink over time.
What should I do if my knock sensor goes bad?
When knock sensors start to go bad, you may hear a pinging or loud knocking coming from your engine. If you ever need to bypass your knock sensors, the most direct way of doing so is to simply disconnect them.
Knock Sensor Problems on GM Vehicles. Knock sensor problems are common on 1999-2007 Chevy Silverado, Express Van, Tahoe and Suburban trucks. Of course, this means that the GMC Sierra and Yukon of the same years have the same issues.
This location can collect water over time under the right circumstances. This wouldn’t be an issue if the knock sensor harness stayed pliable and sealed the connection.Again, because of the location, these rubber boots that seal the connector deteriorate and shrink over time.
Do you need to replace the knock sensor?
Regardless if one or both codes are set, not only should the two original knock sensors be replaced, but you should also replace the harness. In fact, it will most likely shatter like glass when you attempt to disconnect it. The replacement harness comes complete with new connectors and boots.
Where are the knock and Ping sensors located?
It’s a piezoelectric automotive sensor that produces a small voltage signal when it hears internal engine noise that we often call knock and ping. This is why the location of the two sensors is a problem. In order to hear the engine noise reliably the sensors are buried under the intake manifold.
