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P0722 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
The Output Speed Sensor tells the Transmission Control Module (TCM) how fast the output shaft of the transmission is spinning so it can verify the correct gear is engaged. When the TCM receives an inaccurate or irrational signal from this sensor, it is an indication that there is an issue inside the transmission. The engine control module (PCM) or TCM will set code P0722.
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OBD-II Code P0722 is defined as a Output Speed Sensor No Signal
When the code P0722 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is not seeing a consistent speed signal from the Transmission's Output Speed Sensor.
The purpose of the automatic transmission is to match the engine's optimum power and torque characteristics to the driver's desired rate of acceleration and speed by auto-selecting different gear ratios or 'speeds' to power the wheels.
When the code P0722 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is not seeing a proper speed signal from the Transmission's Output Speed Sensor or a greater than a specified RPM difference between the rotational speed of the Input RPM Sensor and the Transmission Output RPM Sensor. This can occur during shifting or when driving at steady speeds in the same gear. It often implies that the transmission is slipping.
When diagnosing a P0722 code, it is important to record the freeze frame information and then to duplicate the code setting conditions with a test drive. Pay close attention to the engine load, throttle position, RPM, and road speed because a P0722 can be difficult to detect.