P0723 Output Speed Sensor Circuit Intermittent

P0723 indicates an intermittent output speed sensor circuit fault. The output-shaft speed signal is dropping out, spiking, or becoming invalid.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not clear an intermittent speed-sensor code without a road test or wiggle test that targets the dropout.

Symptoms of P0723

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0723

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Graph output speed during road vibration, turns, hot operation, and harness movement to catch signal loss or spikes.
Inspect sensor connector pins, wiring insulation, case connector condition, sensor air gap, and debris on the sensor tip.
Compare output speed to wheel speed and commanded gear at the exact moment the intermittent fault records.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.