P077D

2017-10-10

Description:

  • Output Shaft Speed Sensor Circuit High

Possible Symptoms:

  • Check and replace any damaged or loose wiring connections related to the output shaft speed sensor circuit.

  • Inspect and replace the output shaft speed sensor if it is faulty or malfunctioning.

  • Verify and repair any issues with the transmission control module (TCM) that may be causing the high circuit signal.

  • Ensure proper ground connections for the output shaft speed sensor circuit are established and functioning correctly.

  • If all other solutions fail, consider replacing the entire transmission for a more comprehensive fix.

Possible Causes:

  • Faulty output shaft speed sensor

  • Loose or damaged wiring connections to the output shaft speed sensor

  • Malfunctioning engine control module (ECM) or transmission control module (TCM)

  • Faulty transmission shift solenoid

  • Transmission fluid level is low or contaminated

Related Parts:

Possible Solutions:

  • Erratic shifting or shifting problems

  • Harsh or delayed shifting

  • Loss of power or poor acceleration

  • Check Engine Light illuminated

  • Speedometer not working or inaccurate speed reading

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