I think, behind the timing cover.
Where is the knock sensor located on a 1999 Subaru Forester?
that the knock sensor does
If somebody knocks on the front door of the Subaru, the KNOCK sensor, sets off the KNOCK Alarm....LOL
The knock sensor is located near the idle air control solenoid valve on a 2001 Subaru Forester. The knock sensor is responsible for sensing vibrations caused by engine knock.
Knock sensor/vibration sensor
Yes.
the knock sensor in on the drivers side of the block toward the rear, and it's under the intake manifold.
In a 1998 Subaru Legacy, the knock sensor is located on the top of the engine block and to the left of the engine. More specifically, it is under the left rear intake manifold runner.
When is sends a code to the ECM that it is malfunctioning. Usually a PO 325 but the codes are slightly different depending on the model and year. You can get a complete Subaru PO listing if you Google it. If there is no code, your knock sensor is fine.
Could be a bad knock sensor. The ECM may be retarding the timing based on bad input from a faulty knock sensor.
Not necessarily.
Remove the intercooler first. The knock sensor is located under its loation. But you will have to remove some breather pipes to get to it. You will need a long ratchet.