Jeep 4606093AE Sensor-Knock

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To replace them, start by disconnecting the cable from the negative battery terminal. Then, disconnect the knock sensor electrical connector, which is located at the rear of the engine, behind the intake manifold. Remove the intake manifold and then remove the knock sensor assembly by taking out the mounting bolts. Make sure to clean the holes for the mounting bolts before installing the new knock sensor assembly. Note that the left knock sensor is identified by an identification tag and has a larger mounting bolt, so do not switch the knock sensors.

The knock sensors for the 3.7L V6 and 4.7L V8 engines are located on top of the block in the valley between the cylinder heads, underneath the intake manifold.

For the charge temperature sensor, unplug the electrical connector, unscrew the sensor, coat the threads of the new sensor with tape, and install it securely.

Start by disconnecting the cable(s) from the negative battery terminal(s). For the 3.6L V6 engine, remove the intake manifolds and then disconnect the electrical connector(s) before removing the sensor(s) mounting bolt(s). For the 3.7L V6 and 4.7L V8 engines, remove the intake manifold and then disconnect the knock sensor electrical connector located at the rear of the engine, behind the intake manifold. For HEMI engines, raise the front of the vehicle and secure it on jackstands. Disconnect the electrical connector from the knock sensor and remove the knock sensor mounting bolt. Finally, install the knock sensor(s) by reversing the removal process and tightening the mounting bolts.

Disconnect the knock sensor electrical connector located near the rear of the left valve cover. Remove the intake manifold. Remove the knock sensor mounting bolts and remove the sensors. Thoroughly clean the bolts and bolt holes.

Install the knock sensors and tighten the mounting bolts to 15 ft-lbs (20 Nm). Do not apply sealant to the bolts. It is important to properly torque the mounting bolts to ensure proper knock sensor operation and accurate ignition timing control. Installation is the reverse of removal.

For Hemi engines, there are two knock sensors located on the left and right sides of the block below the exhaust manifold. To replace them, raise the front of the vehicle and secure it on jackstands. Disconnect the electrical connector from the knock sensor and remove the mounting bolt. Installation is the reverse of removal, making sure to tighten the mounting bolts to the correct torque.

Start by disconnecting the cable(s) from the negative battery terminal(s). For the 3.6L V6 engine, remove the intake manifolds and then disconnect the electrical connector(s) before removing the sensor(s) mounting bolt(s). For the 3.7L V6 and 4.7L V8 engines, remove the intake manifold and then disconnect the knock sensor electrical connector located at the rear of the engine, behind the intake manifold. For HEMI engines, raise the front of the vehicle and secure it on jackstands. Disconnect the electrical connector from the knock sensor and remove the knock sensor mounting bolt. Finally, install the knock sensor(s) by reversing the removal process and tightening the mounting bolts.