Jeep 56028563AA Sensor Knock

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For 2.4L four-cylinder models, disconnect the battery's negative terminal cable. Disconnect the electrical connector from the knock sensor and unscrew it. To reinstall, tighten the knock sensor to the specified torque. For 3.3L/3.8L V6 models, disconnect the battery's negative terminal cable. Raise the front of the vehicle and secure it on jack stands. Remove the sensor mounting bolt and detach the sensor from the block.

For 2.4L four-cylinder models, disconnect the battery's negative terminal cable. Disconnect the electrical connector from the knock sensor and unscrew it. To reinstall, tighten the knock sensor to the specified torque. For 3.3L/3.8L V6 models, disconnect the battery's negative terminal cable. Raise the front of the vehicle and secure it on jack stands. Remove the sensor mounting bolt and detach the sensor from the block.

Detach the fuel injector harness electrical connector from its bracket without unplugging it.

The electrical connector is disconnected, and the knock sensor mounting bolt is removed.

To access the knock sensor on 2.7L engines, the upper and lower intake manifolds need to be removed, and the right cylinder head also needs to be removed.

For the HEMI engine, there are two knock sensors located on the left and right sides of the block below the exhaust manifold.

The camshaft reference sensor on the 3.3L and 3.8L engines requires a special factory tool (DRB-I) for diagnosis.

For 2000 through 2002 models, unscrew the sensor using a deep socket.

To replace the knock sensors, 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. If you can't find the connector, wait until you have removed the intake manifold and locate the two knock sensors and trace their leads back to the common connector. Remove the intake manifold and then remove the knock sensor assembly by removing the mounting bolts. Make sure to clean the holes for the mounting bolts before installing the new knock sensor assembly. For 3.7L V6 engines, note that the left knock sensor is identified by an identification tag and has a larger mounting bolt. Do not install the left knock sensor in the right sensor mounting position and vice versa, as it will confuse the PCM and cause a Diagnostic Trouble Code. Installation is the reverse of removal, making sure to tighten the knock sensor mounting bolts to the common connector. Remove the intake manifold and then remove the knock sensor assembly by removing the mounting bolts. Make sure to clean the holes for the mounting bolts before installing the new knock sensor assembly. For 3.7L V6 engines, note that the left knock sensor is identified by an identification tag and has a larger mounting bolt. Do not install the left knock sensor in the right sensor mounting position and vice versa, as it will confuse the PCM and cause a Diagnostic Trouble Code. Installation is the reverse of removal, making sure to tighten the knock sensor mounting bolts to the correct torque.

Installation is the reverse of removal, with caution to tighten the mounting bolt to the correct torque.