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Home >> Pontiac >> 2003 >> Grand Prix GTP >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel, Gages, And Console >> Diagnostic Information and Procedures >> DTC P1663: Pcm >> Circuit Description

Circuit Description

The PCM controls the change oil soon indicator when it determines that the engine oil life has decreased to a certain level. DTC P1663 will set when the PCM detects an improper voltage level on the control circuit of the change oil soon indicator.

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