Camaro, Firebird, 1999 - 2002

Camshaft Position (CMP) Sensor

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Description & Operation



5.7L V8 Engines

The CMP sensor is also a magneto resistive sensor, with the same type of circuits as the CKP sensor. The CMP sensor signal is a digital ON/OFF pulse, output once per revolution of the camshaft. The CMP sensor information is used by the PCM to determine the position of the valve train relative to the CKP.

The camshaft reluctor wheel is either pressed onto the camshaft or part of the camshaft gear depending on the application. The feature-or target- is read in a radial or axial fashion respectively. The wheel is a smooth track, half of which is of a lower profile than the other half. This feature allows the camshaft position (CMP) sensor to supply a signal as soon as the key is turned ON, since the CMP sensor reads the track profile, instead of a notch.

Removal & Installation



5.7L V8
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the intake manifold.
  4.  
  5. Remove the camshaft position (CMP) sensor electrical connector
  6.  
  7. Remove the CMP sensor retaining bolt.
  8.  
  9. Remove the CMP sensor.
  10.  

To install:

  1. Install the sensor and the CMP sensor retaining bolt. Tighten the CMP to 18 ft. lbs. (25 Nm).
  2.  
  3. Connect the CMP sensor electrical connector.
  4.  
  5. Install the intake manifold.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Program the transmitters.
  10.  

 
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