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If your 1997 Chrysler LHS suffers from a faulty camshaft position sensor, the powertrain control module will quickly set diagnostic trouble codes such as P1391or P0340, and lead to a no-start condition. Although both codes point to a bad CMP sensor, Chrysler issued a technical service bulletin for 1997 model-year vehicles that called for additional diagnosis – which could indicate that the crankshaft position sensor is actually at fault and not the CMP sensor. Although the engine bay for your vehicle is extremely cramped, replacing a faulty camshaft position sensor couldn't be easier.
Items you will need
- Socket set
- Mopar part No. 4609006 camshaft reference sensor or equivalent
- Inch-pound torque wrench
Open the hood. Let the engine cool before performing any work. Examine the front side of the engine; the camshaft position sensor is mounted on the timing cover – at an angle – to the right of the upper radiator hose and thermostat housing, below the closest intake runner. Disengage the locking tab on the camshaft position sensor's harness connector, then disconnect the connector from the sensor.
Remove the hold-down bolt for the CMP sensor, using a socket, extension and ratchet. Lift the CMP sensor from the timing. Examine the end of the replacement CMP sensor to ensure that a round paper spacer is installed. If there isn't a paper spacer, you must obtain one from a Chrysler or Dodge dealer service department, or obtain a replacement sensor with a spacer.
Insert the replacement CMP sensor into the timing cover. Lightly press down on the sensor to ensure that it is seated far enough to make contact with the camshaft gear. Hold the sensor in position and tighten the hold-down bolt to 105 inch-pounds, using a torque wrench. Connect the harness connector to the CMP sensor to finish the installation process.
- Alldata 9.5; 1997 Chrysler LHS; Powertrain Management; Computers and Control Systems; Camshaft Position Sensor