P0723 code meaning
Output Shaft Speed Sensor Circuit Intermittent
Powertrain system Generic code P07xx codes Check engine light
What P0723 means
The output shaft speed sensor (Hall or inductive) reports the speed of the transmission output; it gives the gear ratio together with input speed and on many vehicles also the road speed for speedometer and cruise control. P0723 means the output speed drops or jumps briefly. GM's 2006 tables flag road speed falling below 61 rpm while driving; the 2019–2025 modules count sudden drops (for example 700 rpm) and fail after more than five, after one trip. In Ford vehicles the ZF 6HP26 flags a drop of more than 1000 rpm with the converter clutch locked, the CFT30 more than 6000 rpm per second. The speedometer needle twitches, shifts become erratic and limp mode may follow at times. Loose contacts are the usual cause.
P0723 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0723
- Speedometer needle twitches or drops briefly
- Occasional wrong shifts or downshift jolts
- Warning lamp
- Limp mode at times
Common causes of P0723
- Most likelyLoose contact, corroded connector or chafing
- PossibleElectrical interference (shielding, ground, added consumers)
- PossibleMetal debris on the sensor or loose mounting
- PossibleSensor faulty internally (temperature-dependent)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Output speed sensorSensor wiringTransmission control module
What each part of P0723 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| 23 | The exact fault in that area. |
What to do next
- Note P0723 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0723
What does P0723 mean?
P0723 means "Output Shaft Speed Sensor Circuit Intermittent". The output shaft speed sensor (Hall or inductive) reports the speed of the transmission output; it gives the gear ratio together with input speed and on many vehicles also the road speed for speedometer and cruise control. It is a generic code, so it means the same on every make.
Is it safe to drive with P0723?
Drive gently and only to a workshop. With P0723 the car can go into limp mode (reduced power) to protect itself.
Will P0723 fail an emissions test?
Yes, it can. P0723 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0723 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0723 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.