DTC P0722 points to a problem where the Powertrain Control Module (PCM) hasn’t detected any signal from the Output Speed Sensor (OSS) or the signal strength falls below the expected range.

1. What does P0722 code mean?

This code indicates that the PCM is not receiving any signal from the Output Speed Sensor, preventing the system from determining the vehicle’s speed.

2. What are the causes of DTC P0722?

Potential causes for DTC P0722 include:

• Faulty Output Speed Sensor: A malfunctioning or failed output speed sensor.
• Wiring Issues: Damaged, corroded, or disconnected wiring and connectors related to the output speed sensor.
• Sensor Alignment or Installation: An incorrectly installed or misaligned output speed sensor.
• Internal Transmission Problems: Issues within the transmission affecting the sensor’s ability to generate a signal.
• PCM or Module Issues: Rare instances of issues within the PCM or related modules affecting signal reception.

3. What are the symptoms of DTC P0722?

Signs associated with DTC P0722 may include:

• Check Engine Light: The illumination of the Check Engine Light due to the absence or weak signal from the output speed sensor.
• Transmission Issues: Erratic or harsh shifting, failure to shift gears properly, or stuck in a particular gear.
• Speedometer Problems: Incorrect or erratic speedometer readings or a non-functional speedometer.

4. How to diagnose DTC P0722?

Steps to diagnose DTC P0722 may include:

• OBD-II Scanner: Retrieving the code and checking for related codes stored in the PCM for further insights.
• Visual Inspection: Examining the output speed sensor, wiring, and connectors for physical damage or wear.
• Sensor Testing: Testing the output speed sensor’s functionality, alignment, and signal output using specialized equipment.
• Circuit Testing: Checking the circuit integrity, including continuity, resistance, and voltage testing along the sensor circuit.

5. How to fix DTC P0722 problem?

Resolving DTC P0722 involves several steps:

• Sensor Replacement: Repairing or replacing the output speed sensor if found faulty.
• Wiring Repair: Fixing or replacing damaged wiring and ensuring secure connections.
• Connector Check: Repairing or replacing damaged connectors for proper signal transmission.
• 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

Addressing DTC P0722 involves rectifying issues preventing the Output Speed Sensor from sending a signal to the PCM. Swift and accurate diagnosis, along with repairing or replacing faulty components, are crucial for restoring proper transmission function and vehicle performance.