P0603

2017-10-10

Description:

  • The fault code P0603 indicates that there is an error with the internal control module's keep alive memory system. This may cause the vehicle to experience a variety of issues related to the control of various systems.

Possible Symptoms:

  • Illuminated check engine light

  • Loss of power or acceleration

  • Rough or erratic engine idle

  • Poor fuel economy

  • Inability to start the vehicle

Possible Causes:

  • Faulty or damaged internal control module

  • Electrical wiring issues within the system

  • Battery or charging system issues

  • Corroded or loose electrical connections

Related Parts:

  • Engine Control Module (ECM): ECM is the part of the car computer that controls the engine system and performance. Problems lead to poor fuel economy, engine stalling & unwanted engine vibrations

Possible Solutions:

  • Replace the internal control module

  • Check and repair any damaged wiring or connections

  • Diagnose and repair any battery or charging system issues

  • Clean and tighten any corroded or loose electrical connections

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