Mopar 5149188AA Sensor-Knock

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The sensor nearest the front of the engine is Sensor no. 1 and the sensor nearest the rear of the engine is Sensor no.2.

The camshaft reference sensor on the 3.3L and 3.8L engines requires a special factory tool (DRB-I) for diagnosis. To replace it, first, unplug the sensor lead at the electrical connector and loosen the retaining bolt. Remove the sensor from the cylinder head. If reinstalling the same sensor, remove the old spacer, clean the sensor face, and install a new spacer and inspect the O-ring. For a new sensor, ensure a new paper spacer is already installed, and the O-ring is properly positioned. Apply oil to the O-ring before installation, push the sensor down to contact the cam timing gear, and tighten the retaining bolt. 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. For the coolant temperature sensor, open the radiator cap, squeeze the upper radiator hose, reinstall the cap, unplug the electrical connector, unscrew the sensor, coat the threads of the new sensor, install it securely, and check the coolant level. For the crankshaft reference sensor, unplug the electrical connector, loosen the retaining bolt, remove the sensor, and if reinstalling, remove the old spacer and install a new one. Finally, for the throttle body temperature sensor, remove the air cleaner, disconnect throttle cables, remove the accelerator cable bracket, unplug the electrical connector from the sensor, remove the sensor, apply heat transfer compound, install the sensor securely, and reverse the steps for reinstallation. For the Throttle Position Sensor (TPS), disconnect the electrical connector, use a digital ohmmeter to check the resistance readings while moving the throttle lever, and replace the TPS if readings are incorrect. Then, follow the steps for replacement, including removal of the air cleaner assembly for the 2.5L engine, unplugging the electrical connector, removing the screws retaining the TPS, and reinstalling it securely.

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.