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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Engine Control System & Fuel System - 3.8L - DTC P0016 To DTC P0350) >> DTC P0340 >> Component Test

Component Test

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the CMP sensor for looseness and correct installation.
  2. Connect jumper wires from the CMP sensor connector 12-volt reference and the low reference to the CMP sensor. Turn ON the ignition, with the engine OFF.
  3. Connect a DMM to the CMP sensor signal at the CMP sensor and observe the Duty Cycle. Pass a steel object by the sensor repeatedly. The Duty Cycle should increment.
    • If the Duty Cycle does not increment, replace the CMP sensor.
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