P0722 – Output Speed Sensor Circuit No Signal DTC Trouble Code

In order to decide when to actuate gear changes, the torque convertor and other vital functions, the engine control unit uses data coming from a number of sensors, including the output shaft speed sensor. The P0722 DTC indicates the ECU is not receiving data from the OSS sensor, which could negatively impact transmission performance.

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How Serious is the Code?

The P0722 OBD2 code is designed to warn you about one problem, but allowing the symptoms to persist can lead to even more.

Symptoms

  • Check engine light
  • Erratic, delayed or harsh shifts
  • Speedometer may appear broken
  • Limp Mode
  • Transmission not able to shift gears
  • Engine misfire/hesitation

Causes

  • Faulty output speed sensor
  • Malfunctioning input speed sensor / TSS sensor
  • Failed transmission fluid temperature sensor
  • Broken, loose or corroded connectors
  • Frayed or shorted wiring
  • Valve body or pressure related issues

How to Diagnose the Code?

If a P0722 DTC has been stored in the ECU, then the mechanic should see if there are other trouble codes that may indicate why the OSS sensor stopped communicating with the ECU. The wiring and connectors should be carefully examined to see if any damage or corrosion may have caused a short. The transmission fluid itself should also be checked for metallic debris, because the metal fragments can get stuck on the magnetic sensor head and prevent it from working properly. If the transmission fluid and OSS sensor is clean, then the sensor itself will need to be tested to see if it works. The input shaft speed sensor and TFT sensor should probably be tested as well.

Common Mistakes When Diagnosing

Ignoring the condition of the transmission fluid, translation fluid leaks, and other sensors can lead to a more complicated diagnostic process.

What Repairs Will Fix P0722?

  • Replace output speed sensor
  • Replace input speed sensor
  • Repair or replace damaged wiring and/or connectors
  • Replace the transmission fluid temperature sensor
  • Change transmission fluid and filter
  • Fix transmission fluid leaks

Related Codes

On some vehicles, the transmission output shaft sensor can also be used as the vehicle speed sensor (VSS sensor). And still others may share the same code for the TFT sensor, so you will need to consult a mechanic in order to weed through all of the possible codes.

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Links To Diagnostic Codes

Trouble CodeDescription
P0218Transmission Over Temperature Condition
P0700Transmission Control System (MIL Request)
P0701Transmission Control System Range/Performance
P0702Transmission Control System Electrical
P0703Torque Converter/Brake Switch B Circuit
P0704Clutch Switch In put Circuit Malfunction
P0705Transmission Range Sensor Circuit Malfunction (PRNDL Input)
P0706Transmission Range Sensor Circuit Range/Performance
P0707Transmission Range Sensor Circuit Low Input
P0708Transmission Range Sensor Circuit High Input
P0709Transmission Range Sensor Circuit intermittent
P0710Transmission Fluid Temperature Sensor Circuit
P0711Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712Transmission Fluid Temperature Sensor Circuit Low Input
P0713Transmission Fluid Temperature Sensor Circuit High Input
P0714Transmission Fluid Temperature Sensor Circuit Intermittent P0715
P0715Input/Turbine Speed Sensor Circuit
P0716Input/Turbine Speed Sensor Circuit Range/Performance 
P0717Input/Turbine Speed Sensor Circuit No Signal
P0718Input/Turbine Speed Sensor Circuit Intermittent
P0719Torque Converter/Brake Switch B Circuit Low
P0720Output Speed Sensor Circuit
P0721Output Speed Sensor Circuit Range/Performance
P0722Output Speed Sensor Circuit No Signal
P0723Output Speed Sensor Circuit Intermittent
P0724 Torque Converter/Brake Switch B Circuit High
P0725Engine Speed Input Circuit
P0726Engine Speed Input Circuit Range/Performance
P0727Engine Speed Input Circuit No Signal
P0728Engine Speed Input Circuit Intermittent
P0729Gear 6 Incorrect Ratio
P0730Incorrect Gear Ratio
P0731Gear 1 Incorrect Ratio
P0732Gear 2 Incorrect Ratio
P0733Gear 3 Incorrect Ratio
P0734Gear 4 Incorrect Ratio
P0735Gear 5 Incorrect Ratio
P0736Reverse Incorrect Ratio
P0738TCM Engine Speed Output Circuit
P0739TCM Engine Speed Output Circuit Low
P0740Torque Converter Clutch Circuit Malfunction
P0741Torque Converter Clutch Circuit
P0742Torque Converter Clutch Circuit Stuck On
P0743Torque Converter Clutch Circuit Electrical
P0744Torque Converter Clutch Circuit Intermittent
P0745Pressure Control Solenoid 'A'
P0746Pressure Control Solenoid 'A' Performance or Stuck Off
P0747Pressure Control Solenoid 'A' Stuck On
P0748Pressure Control Solenoid 'A' Electrical
P0749Pressure Control Solenoid 'A' Intermittent
P0750Shift Solenoid 'A'
P0751Shift Solenoid 'A' Performance or Stuck Off
P0752Shift Solenoid 'A' Stuck On
P0753Shift Solenoid 'A' Electrical
P0754Shift Solenoid 'A' Intermittent
P0755Shift Solenoid 'B'
P0756Shift Solenoid 'B' Performance or Stuck Off
P0757Shift Solenoid 'B' Stuck On
P0758Shift Solenoid 'B' Electrical
P0759Shift Solenoid 'B' Intermittent
P0760Shift Solenoid 'C'
P0761Shift Solenoid 'C' Performance or Stuck Off
P0762Shift Solenoid 'C' Stuck On
P0763Shift Solenoid 'C' Electrical
P0764Shift Solenoid 'C' Intermittent
P0765Shift Solenoid 'D'
P0766Shift Solenoid 'D' Performance or Stuck Off
P0767Shift Solenoid 'D' Stuck On
P0768Shift Solenoid 'D' Electrical
P0769Shift Solenoid 'D' Intermittent
P0770Shift Solenoid 'E'
P0771Shift Solenoid 'E' Performance or Stuck Off
P0772Shift Solenoid 'E' Stuck On
P0773Shift Solenoid 'E' Electrical
P0774Shift Solenoid 'E' Intermittent
P0775Pressure Control Solenoid 'B'
P0776Pressure Control Solenoid 'B' Performance or Stuck Off
P0777Pressure Control Solenoid 'B' Stuck On
P0778Pressure Control Solenoid 'B' Electrical
P0779Pressure Control Solenoid 'B' Intermittent
P0780Shift Malfunction
P07811-2 Shift
P07822-3 Shift
P07833-4 Shift
P07844-5 Shift
P0785Shift/Timing Solenoid
P0786Shift/Timing Solenoid Range/Performance
P0787Shift/Timing Solenoid Low
P0788Shift/Timing Solenoid High
P0789Shift/Timing Solenoid Intermittent
P0790Normal/Performance Switch Circuit
P0791Intermediate Shaft Speed Sensor Circuit
P0792Intermediate Shaft Speed Sensor Circuit Range/Performance
P0793Intermediate Shaft Speed Sensor Circuit No Signal
P0794Intermediate Shaft Speed Sensor Circuit Intermittent
P0795Pressure Control Solenoid 'C'
P0796Pressure Control Solenoid 'C' Performance or Stuck off
P0797Pressure Control Solenoid 'C' Stuck On
P0798Pressure Control Solenoid 'C' Electrical
P0799Pressure Control Solenoid 'C' Intermittent
P0810Transmission Fluid Pressure Manual Valve Position Switch
P0811Maximum Adaptive and Long-Term Shift Times
P0812Transmission Fluid Overtemperature
P0813Torque Control Solenoid Malfunction
P0814Torque Converter Overstressed
P0816Transmission Fluid Pressure Manual Valve Position Switch Park/Neutral with Drive Ratio
P0817Transmission Fluid Pressure Manual Valve Position Switch Reverse with Drive Ratio
P0818Transmission Fluid Pressure Manual Valve Position Switch Drive without Drive Ratio
P0819Internal Mode Switch No Start/Wrong Range
P0820Internal Mode Switch Circuit ‘A’ Low
P0876Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance
P1821Internal Mode Switch Circuit ‘B’ Low
P1822Internal Mode Switch Circuit ‘B’ High
P1822Internal Mode Switch Circuit ‘B’ High
P1823Internal Mode Switch Circuit ‘P’ Low
P1824Internal Mode Switch Circuit ‘P’ High
P1825Internal Mode Switch Invalid Range
P1826Internal Mode Switch Circuit ‘C’ High
P1831Pressure Control Solenoid Power Circuit Low
P1832Pressure Control Solenoid Power Circuit High
P1833GM – TCC Solenoid Power Control Circuit Low Voltage
P1834GM – TCC Solenoid Power Control Circuit High Voltage

Links To Symptoms

Symptoms
Low Transmission Fluid
Transmission Slipping
Limp Mode
Burnt Transmission Fluid
DTC / Check Engine Codes
Lack of Responses
Torque Converter Problems
Whining, Clunking or Humming
Transmission Fluid Leak
Solenoid Problems

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