P0723 — Output Speed Sensor No Signal
Drivable short-term, but fix now to avoid damage.
What P0723 means
This code means the transmission control module is receiving no signal at all from the output speed sensor, so it has no data on output shaft speed. It usually comes from a failed sensor, a broken wire, a corroded connector, or a loose plug. Repairs typically involve checking the circuit and replacing the sensor, and it's often fixable without opening up the transmission.
Common symptoms
- Check engine light is on
- Transmission stuck in limp mode
- Harsh or unpredictable shifts
- Speedometer not working
- Cruise control disabled
Common causes
- Failed output speed sensor
- Broken or open wiring in the sensor circuit
- Corroded or disconnected sensor connector
- Damaged tone ring on the output shaft
- Faulty transmission control module
Typical repair cost
$150 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0723 code?
Only for a short distance if you must. With no speed signal the transmission may stay in limp mode and shift unpredictably, so get it inspected right away to stay safe.
How much does it cost to fix a P0723 code?
Most repairs cost between $150 and $450, mainly for the sensor and any wiring or connector repairs. Module-related issues can push the cost higher.
Is a P0723 code serious?
Yes, it should be taken seriously. A complete loss of signal usually forces limp mode and affects safe shifting, so it needs prompt attention.
Why does my speedometer stop working with a P0723 code?
The same output speed sensor often feeds the speedometer, so when it sends no signal the speedometer typically reads zero or stops moving altogether.