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Home >> Pontiac >> 1997 >> Firefly 2D Hatchback, 1.3 9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes 1.0 & 1.3L >> Diagnostic Trouble Code Tests >> DTC P0603 - Powertrain Control Module (Pcm) Memory Reset >> Circuit Description

Circuit Description

PCM has detected a communication circuitry failure. DTC P0603 will set when an EEPROM data readout error occurs.

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