P0977

2017-10-10

Description:

  • The fault code P0977 suggests that there is a malfunction in the circuit that controls the 'B' shift solenoid, causing it to stay in the high position.

Possible Symptoms:

  • Transmission may fail to shift gears

  • Harsh shifting

  • Decreased fuel efficiency

  • Illuminated check engine light

Possible Causes:

  • Faulty shift solenoid 'B'

  • Damaged or loose wiring or connections in the circuit

  • Failed transmission control module (TCM)

Related Parts:

  • Shift Solenoid: It helps to change gears in automatic transmission cars. A bad solenoid causes difficulty in shifting gears

Possible Solutions:

  • Replace the shift solenoid 'B'

  • Inspect and repair any damaged or loose wiring or connections

  • Replace the transmission control module (TCM) if necessary

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