P077A - Output Speed Sensor Circuit - Loss of Direction Signal

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P077A Possible Causes

  • Faulty Speed Sensor
  • Speed Sensor harness is open or shorted
  • Speed Sensor circuit poor electrical connection

How do I fix code P077A?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Cost of diagnosing the P077A code

Labor: 1.0

The cost of diagnosing the P077A code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P077A Description

The speed sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal. The pulse signal is sent to the Transmission Control Module (TCM) which converts it into vehicle speed.
OBDII Code P077a - Output Speed Sensor Circuit - Loss of Direction Signal - AutoCodes.com

More Information

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