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Home >> Subaru >> 2009 >> Impreza WRX STI F4-2.5L DOHC Turbo >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Knock Sensor >> Service and Repair
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Knock Sensor: Service and Repair

Knock Sensor

REMOVAL

1. Disconnect the ground cable from the battery.






2. Remove the intercooler.
3. Remove the intake manifold.
4. Remove the secondary air combination valve RH.
5. Remove the knock sensor from the cylinder block.






INSTALLATION

1. Install the knock sensor to the cylinder block.

NOTE: The portion of the knock sensor cord that is pulled out must be positioned at a 60° angle relative to the engine rear.






2. Install the secondary air combination valve RH.
3. Install the intake manifold.
4. Install the intercooler.
5. Connect the ground cable to battery.