P0723Output Shaft Speed Sensor Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Speedometer needle twitches or drops briefly
- Occasional wrong shifts or downshift jolts
- Warning lamp
- Limp mode at times
- Likely causes
- 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)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.