DTC P0723 indicates an intermittent signal coming from the Output Speed Sensor (OSS). The Powertrain Control Module (PCM) receives an erratic or intermittent signal from this sensor, affecting the vehicle’s ability to determine its speed accurately.

1. What does P0723 code mean?

P0723 code signifies that the PCM is intermittently receiving an unreliable or sporadic signal from the Output Speed Sensor, affecting the system’s ability to calculate vehicle speed correctly.

2. What are the causes of DTC P0723?

The potential causes for DTC P0723 include:

• Faulty Output Speed Sensor: A malfunctioning or failing Output Speed Sensor.
• Wiring Issues: Damaged, corroded, or loose wiring and connectors related to the output speed sensor.
• Poor Electrical Connections: Intermittent electrical connections affecting signal transmission.
• Sensor Alignment or Installation: An incorrectly installed or misaligned output speed sensor.
• Interference or Environmental Factors: External factors affecting sensor signals, such as electromagnetic interference or environmental conditions.

3. What are the symptoms of DTC P0723?

Signs associated with DTC P0723 might include:

• Check Engine Light: Illumination of the Check Engine Light due to intermittent or unreliable signals from the output speed sensor.
• Erratic Transmission Behavior: Intermittent or erratic shifting patterns, harsh shifts, or failure to shift gears appropriately.
• Speedometer Issues: Inaccurate or fluctuating speedometer readings or a non-functional speedometer.

4. How to diagnose DTC P0723?

Diagnostic steps for DTC P0723 may include:

• Code Reading: Using an OBD-II scanner to retrieve the code and checking for related codes stored in the PCM for additional information.
• Visual Inspection: Examining the output speed sensor, wiring, and connectors for physical damage, corrosion, or loose connections.
• Sensor Testing: Testing the output speed sensor’s functionality, alignment, and signal output using specialized equipment.
• Circuit Testing: Checking the circuit for continuity, resistance, and voltage drop during operation to identify intermittent faults.

5. How to fix DTC P0723 problem?

Steps to resolve DTC P0723 might include:

• Sensor Replacement: Repairing or replacing the output speed sensor if it’s found to be faulty or unreliable.
• Wiring Repair: Fixing or replacing damaged wiring and ensuring secure connections for consistent signal transmission.
• Connector Check: Repairing or replacing damaged connectors to ensure a stable electrical connection.
• Clearing Codes: Using an OBD-II scanner to clear the codes after fixing the issue and resetting the Check Engine Light.
• Professional Assistance: Seeking help from a qualified technician for advanced diagnostics or module-related problems.

Conclusion

DTC P0723 relates to intermittent issues with the Output Speed Sensor, leading to unreliable speed readings and potential transmission irregularities. Addressing this issue involves identifying and rectifying faults in the sensor, wiring, or connections to ensure consistent and accurate signal transmission, ultimately restoring proper transmission function and vehicle performance.