P0771 OBD-II Trouble Code: Shift Solenoid E Performance or Stuck Off

check engine light

P0771 code definition

The P0771 code signifies that the car’s computer has detected a problem with shift solenoid E.

What the P0771 code means

A P0771 code means that there is a problem with the shift solenoid E in the automatic transmission. Your car’s transmission uses solenoids to automatically adjust the flow of transmission fluid to match driving needs and ensure smooth shifting. The problem can be due to electrical issues with the solenoid, or it could be contamination of the solenoid itself causing it to stick.

What causes the P0771 code?

Code P0771 can be caused by many different factors, including the following:

What are the symptoms of the P0771 code?

You may experience a number of different symptoms with code P0771, including the following:

How does a mechanic diagnose the P0771 code?

First, a mechanic will use an OBD II scanner to pull any codes from the car’s computer. Often, there are additional codes stored as well as the P0771 code. These can provide further guidance for the mechanic to determine the underlying problem.

The mechanic will also check the level and color of the transmission fluid to determine if the fluid is low, dirty or contaminated. This can also provide valuable guidance for further diagnostics, as well as determining the underlying cause of the trouble code.

If the fluid smells burnt or is very dark, the mechanic may pull the transmission fluid pan and inspect the fluid as well as the transmission for signs of damage from debris, such as clutch material. If no debris is found, the mechanic will then inspect the wiring harness and connection to shift solenoid E and replace any damaged wires, or clean corrosion and tighten connections.

The mechanic will also top off the transmission fluid (or change it completely in the case that it is dirty), and then clear the codes. The vehicle will be test driven for operation as well as to see if the code resets. Freeze frame data stored in the computer will also be used.

The shift solenoid E may also need to be tested mechanically and electrically. If it fails these tests, it will need to be replaced. The entire shift solenoid circuit should also be tested.

Common mistakes when diagnosing the P0771 code

The most common mistake is replacing shift solenoid E without first testing the shift solenoid circuit. Often, a malfunction with the circuit due to wiring damage or loose connections is the actual cause, rather than failure of the solenoid. Debris clogging the solenoid is also a common culprit.

How serious is the P0771 code?

The P0771 code is serious, as it will affect whether the vehicle can be safely driven. If the transmission fluid is contaminated, further driving can cause damage to other system components, as well. Repair this problem as soon as possible.

What repairs can fix the P0771 code?

In most instances, repairs to the shift solenoid wiring harness will fix the P0771 code, although replacing a faulty or clogged solenoid is also common. Adhering to the specified transmission service schedule can help to mitigate the risk of debris clogging the solenoid.

Additional comments for consideration regarding the P0771 code

While it can be tempting to assume that the problem is the solenoid, mechanics should not forget that the circuit can play a significant role here, and should be tested before parts are replaced.

Need help with a P0771 code?

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 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

More related articles

Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...

Related questions

Q: Engine fault reduced power

It sounds like you could have a sticking boost pressure actuator. Unfortunately, YourMechanic does not work on your model vehicle. I suggest having the dealership take a look at it.

Q: Venza 2010 L4-2.7L: My check engine light is permanently turned On. I have these codes P0012, P0016, P0017. What needs to be fixe

These are fault codes indicating problems related to the timing of your car's engine. Normally the car will not run very well or sometimes not at all when these are on. I would suggest having an expert from YourMechanic come...

Q: Car wont start

Have the vehicle scanned and see if there is any engine codes. If you have codes then have them diagnosed first in order to more easily pinpoint the problem. If you are getting cam or crank sensor codes, then look...