P0723

Output Shaft Speed Sensor Circuit Intermittent

Q: Is it safe to drive with P0723?

Short-term yes, but when the speed signal cuts out the transmission may shift harshly or fall into limp mode, which is unsettling in traffic. Diagnose it soon.

Q: Can I just clear P0723?

Being intermittent, it may stay away briefly then return. Track down the loose wiring or failing sensor rather than repeatedly clearing it.

Transmission speed sensor Generic OBD-II High

What it means

P0723 means the transmission's output shaft speed sensor signal is cutting out intermittently. That sensor tells the controller how fast the output shaft is turning, so brief dropouts cause erratic or harsh shifts, speedometer glitches, and occasional limp mode. The cause is usually a loose connector or a failing sensor rather than the transmission itself.

High

Can I keep driving? Drivable, but expect erratic or harsh shifts and a possible limp mode when the signal drops out. Have it diagnosed before long trips.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P0723 scans

P0720in 62.5% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Erratic, harsh, or delayed shifting
Transmission dropping into a fixed limp gear intermittently
Speedometer glitching or reading zero at times
Check-engine light on

Common causes

Most likely first

Faulty output shaft speed sensorLikely
Intermittent wiring fault — chafed, loose, or corroded connectorCommon
Damaged reluctor / tone ring the sensor readsCommon
Metal debris on the sensor tipLess often
Failed transmission control module (least common)Less often

How to diagnose & fix

Work through it in order

Scan and monitor output shaft speed live while driving to catch the dropout.
Wiggle-test the sensor connector and harness to reproduce the intermittent fault.
Inspect the sensor tip and connector for debris, corrosion, or a loose fit.
Check the reluctor/tone ring for damaged or missing teeth.
Replace the sensor or repair the wiring as found. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0723?+

Short-term yes, but when the speed signal cuts out the transmission may shift harshly or fall into limp mode, which is unsettling in traffic. Diagnose it soon.

Can I just clear P0723?+

Being intermittent, it may stay away briefly then return. Track down the loose wiring or failing sensor rather than repeatedly clearing it.

Read & clear P0723 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX