DTC P0603 & P1633: Powertrain Control Module (Pcm) Malfunction

Fig 1: Powertrain Control Module (PCM) Malfunction Detection Condition

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Fig 2: PCM Malfunction possible causes

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Fig 3: Diagnostic Procedure (DTC P0603 & P1633) (Steps 1-3)

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Fig 4: Diagnostic Procedure (DTC P0603 & P1633) (Steps 4-5)

Courtesy of MAZDA MOTORS CORP.