LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2006 >> Impala LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.9L - DTC P0010 To DTC P0420 >> DTC P0335 or P0336 >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

  1. With the engine running, observe the Engine Speed parameter with the scan tool. The parameter should display the current engine speed matching the CMP Sensor parameter.
    • If the Engine Speed parameter displays a value other than the current engine speed, continue with Circuit/System Testing.
  2. With the engine running, observe the CKP Active Counter parameter with the scan tool. The counter should increment from 0-255 and over again with each CKP sensor pulse.
    • If the CKP Active Counter displays a value of 0, or a fixed value, continue with Circuit/System Testing.
  3. Turn OFF the ignition for 60 seconds.
  4. Start the engine. Do not cycle the ignition until this test is completed.
  5. Operate the vehicle in various operating conditions within the Conditions for Running the DTC and observe the CKP Resync Counter parameter with the scan tool. The CKP Resync Counter should remain at 0 counts.
    • If the CKP Resync Counter increments, continue with Circuit/System Testing.
scientia non olet · About LEMON Manuals