P0641

2017-10-10

Description:

  • The fault code P0641 warns of a potential problem with the 'A' circuit of the sensor reference voltage, which could lead to engine malfunctions or failure to start.

Possible Symptoms:

  • Engine may not start or may run poorly

  • Illuminated check engine light

  • Restricted engine power or acceleration

  • Increased fuel consumption

Possible Causes:

  • Faulty sensor reference voltage circuit

  • Open circuit in the sensor reference voltage circuit

  • Faulty engine control module (ECM)

  • Loose or corroded 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:

  • Check and repair any damage or faults in the sensor reference voltage circuit

  • Replace the engine control module (ECM) if necessary

  • Check and clean any loose or corroded electrical connections

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