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Home >> Chevrolet >> 2006 >> Chevy Express G2500, Van Cargo Extended, 6.6 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 6.6L (LLY) - DTC P0016 To DTC P0342 >> DTC P0116 >> Circuit/System Testing

Circuit/System Testing

  1. Disconnect the ECT sensor.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure for the proper voltage range of 4.9-5.2 volts between the ECT signal circuit and a good ground with a DMM.
    • If the voltage is less than 4.9 volts, test the ECT sensor signal circuit for a high resistance short to ground or a faulty ECM.
  4. Remove and test the ECT sensor. Refer to Component Testing.
    • If the resistance measurements of the ECT sensor are out of range, replace the sensor.
    • If the ECT sensor tests normal and the DTC continues to set, replace the ECM.
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