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P0722 is a diagnostic trouble code (DTC) for "Output Speed Sensor No Signal". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P0722 code is stored when the PCM gets an incorrect or irrational input signal from the transmission’s output speed sensor. With an incorrect, intermittent, or inaccurate signal, the transmission has no accurate information about speed, and it cannot create an appropriate shifting strategy.
Basically, when the PCM cannot detect a consistent or expected speed signal from the transmission’s output speed sensor, it will be unable to correctly predict how and/or when to shift up or down appropriately. When this happens and the P0722 code is saved, the Check Engine light will turn on, and there may be other symptoms, as well, including harsh shifting.
There are a few common issues that can cause a P0722 code to be stored, including:
In addition to illuminating the Check Engine light, a P0722 code can also come with a number of other symptoms. These include:
In some rare instances, there will be no additional symptoms to the Check Engine light turning on. However, if the problem is left long enough, even these cases will generally develop problems with vehicle performance.
To diagnose the problem, a mechanic will first use an OBD-II scanner to identify the stored P0722 code and any other codes that may be related to it. Before addressing the P0722 code, they’ll first address any other codes and then retest the system to see if the P0722 code is stored again.
After that, the mechanic will visually inspect the output speed sensor, its wiring, and its connectors to ensure that it doesn't have an open or shorted circuit. They will then inspect and test the shift solenoid and the valve body to diagnose the cause of the problem before replacing or attempting to repair any one component in the system.
When the P0722 code is set, the symptoms can look much like an internal transmission issue, a misfiring engine, a malfunctioning driveline, a problem with the fuel delivery system, and other issues. That’s why it’s important to check the code before attempting to diagnose the problem.
While a P0722 code can occasionally have no symptoms other than an illuminated Check Engine light, in most cases the symptoms can make driving difficult or nearly impossible. Stalling at idle or at speed can be incredibly dangerous, so don’t wait to get this issue taken care of.
The proper repair will depend on the problem causing the P0722 to be set. Some of the most common repairs that can fix these problems include:
A P0722 code could have a simple solution, but if it’s left untreated, it can cause major problems for the vehicle’s transmission and the driver’s safety. Plus, if the Check Engine light is illuminated when you take your car to get the emissions tested, it will not pass. This can cause problems for legally registering your car in your state.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.