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2006 Buick Terraza intermittent Check Engine light on

Some customers can comment on a motor light to be lit check box. This condition is intermittent and research, the technician can find DTC P0128 set. Correction to verify that the cooling system is filled to the appropriate level and with a scan-tool, make sure that the thermostat is open at the right temperature. If everything works, then you must reprogram the PCM with a new calibration using the Service Programming System (SPS). An updated PCM calibration has been released to address this condition. This new service calibration is available on TIS2WEB. Important: The new calibration is recorded in a calibration that addresses long crank time in hot restart situations.

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