What are the common causes of P0723?

A loose output speed sensor connector. Chafed harness wiring. An output speed sensor failing when hot. Water in the connector. A poor ground at the TCM.

Monitor output speed on a test drive. Wiggle test the sensor connector and harness. Check the connector for water or corrosion. Measure sensor resistance against spec. Replace the output speed sensor if the signal drops. Clear the code and retest.

P0723

Output Shaft Speed Sensor Circuit Intermittent

System: Transmission (P code)
Lamp: Check Engine Light
Category: Powertrain - Transmission

What it means

P0723 means Output Shaft Speed Sensor Circuit Intermittent.

Where it lives

For P0723, the circuit described runs through the sensor. The description of P0723 reports a fault at the sensor.

Check these first

A loose output speed sensor connector
Chafed harness wiring
An output speed sensor failing when hot
Water in the connector
A poor ground at the TCM

What to do next

Monitor output speed on a test drive
Wiggle test the sensor connector and harness
Check the connector for water or corrosion
Measure sensor resistance against spec
Replace the output speed sensor if the signal drops
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.