What Does P0723 Mean?
The output speed sensor circuit is producing an intermittent signal. The TCM occasionally loses the output speed signal and then regains it. This causes momentary issues with shift timing, speedometer accuracy, and torque converter clutch engagement. The driver may notice brief surges, hesitations, or speedometer flickering.
Common Causes
35%
Loose or corroded output speed sensor connector
25%
Failing output speed sensor with intermittent internal fault
20%
Damaged wiring with intermittent break (chafed or cracked insulation)
10%
Partially damaged reluctor ring causing periodic signal dropout
10%
Sensor mounting loose allowing movement and variable air gap
Diagnostic Steps
1
Data-log the OSS PID during an extended test drive. Look for momentary drops to 0 RPM while driving at steady speed — this confirms intermittent signal loss.
2
Wiggle the OSS connector and harness while monitoring live data. Correlate any signal changes with connector or harness movement.
3
Inspect the connector for corrosion, water intrusion, spread pins, or poor terminal tension. Repair or replace as needed.
4
Verify the sensor mounting bolt is tight. A loose sensor can vibrate and lose proximity to the reluctor, causing intermittent signal loss.
5
Measure sensor resistance while tapping and flexing the sensor body. Fluctuating or intermittent OL readings confirm internal sensor failure.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The output speed sensor circuit is producing an intermittent signal. The TCM occasionally loses the output speed signal and then regains it. This causes momentary issues with shift timing, speedometer accuracy, and torque converter clutch engagement. The driver may notice brief surges, hesitations, ...
The most common cause of P0723 (Output Speed Sensor Circuit Intermittent) is: Loose or corroded output speed sensor connector
Typical repair costs for P0723 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent signal loss can cause momentary speedometer drops, brief shift quality issues, and potential ABS/traction control disruptions. The vehicle is generally drivable but repair should be scheduled soon to avoid the condition worsening to a complete signal loss.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0723 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
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