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P0773 is a diagnostic trouble code (DTC) for "Shift Solenoid E Electrical". 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.
This DTC is the universal OBD-II code for Shift Solenoid E Electrical, indicating a problem with the solenoid valve which responds to signals telling it which gear position to initiate.
The transmission control module (TCM) turns shift solenoid valve E on or off depending upon the operating conditions of the vehicle. If there is a malfunction somewhere in the wiring or solenoid itself, it will cause abnormality in the gear ratio, causing P0772 to set.
A number of issues can cause this DTC, including:
Common symptoms include an illuminated Check Engine or Service Engine Soon light, slippage while shifting gears, transmission overheating, harsh shifting, and compromised fuel economy. The vehicle may go into limp mode, and other shift solenoid codes may set. In some cases, there may be no discernible symptoms at all aside from the Check Engine Light and the stored code.
The following actions may be necessary to diagnose this DTC:
The first temptation is to automatically replace the shift solenoid, when in fact the problem often lies in the circuit. It’s important to follow the manufacturer’s diagnostic procedures in order to correctly diagnose and repair the problem.
This can be a very serious problem if not addressed promptly, particularly if the vehicle is already exhibiting signs of gear slippage or has entered limp-in mode. It’s important to catch the issue early on to avoid severe damage to the transmission itself, if possible.
In order to rectify this DTC, one or more of the following may be necessary:
Bad wiring or connectors may cause an intermittent condition – meaning the code will not set consistently. This can be a difficult situation to diagnose, and sometimes it’s best to wait until the problem does return repeatedly in order to get a proper diagnosis and repair.
Beware if a shop immediately tells you your transmission must be replaced, unless they have thoroughly examined all other possibilities. Often, replacing the solenoid itself will remedy the issue, which is a much more inexpensive fix than a complete rebuild. Don’t hesitate to get a second opinion from a qualified mechanic if you have any doubts about the correctness of the diagnosis and repair recommendation you have received.
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.