Circuit/System Testing

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The CKP System Variation Learn Procedure may have to be repeated up to 5 times before the procedure is learned for various reasons.
  1. Perform the CKP System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn . The scan tool should display Learned this Ignition.
    • If the CKP System Variation Learn Procedure cannot be performed successfully, inspect for the following conditions:
  • Any worn crankshaft main bearings
  • A damaged reluctor wheel
  • Excessive crankshaft runout
  • A damaged crankshaft-Refer to Crankshaft and Bearings Cleaning and Inspection .
  • Interference in the signal circuit of the CKP sensor
  • The ignition switch is in the ON position until the battery is drained.
  • An ECM power disconnect with the ignition ON that may have erased the stored value and set DTC P0315
  • Any debris between the CKP sensor and the reluctor wheel
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.