P0778

2017-10-10

Description:

  • The fault code P0778 indicates that there is an issue with the electrical circuit controlling pressure control solenoid 'B'. This may cause problems with the transmission shifting properly, and can cause damage to the transmission if left unaddressed.

Possible Symptoms:

  • Harsh or delayed shifting

  • Transmission slipping or not shifting at all

  • Illuminated check engine light

  • Reduced fuel efficiency

  • Overheating transmission

Possible Causes:

  • Failed pressure control solenoid 'B'

  • Faulty wiring or connections in the circuit

  • Loose or corroded electrical connections

  • Failed transmission control module (TCM)

Related Parts:

  • Pressure Control Solenoid: This solenoid regulates the oil flow in the transmission. Problems with this solenoid lead to engine misfire, poor fuel economy, poor acceleration

Possible Solutions:

  • Replace the pressure control solenoid 'B'

  • Check and repair any damaged wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the transmission control module (TCM) if necessary

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