P0771 code — how to fix error fast

If you notice problems with the way your gearbox shifts the gears in the car, chances are that a diagnostic scan would reveal the P0771 code. It’s one of the most frequently encountered transmission codes by drivers, and could potentially lead to more severe transmission problems.

So, our team wanted to give you a complete guide on P0771 code meaning and implications to help you cope with the issue. We’ll also give you some hints on what you may be able to do to deal with the issue without having to do such expensive repairs.

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What does the P0771 code mean?

The P0771 code is a generic powertrain code, which means it can appear in any vehicle, regardless of the make or model. It specifically indicates that there’s an issue with the shift solenoid E control circuit, which is responsible for regulating the transmission fluid pressure.

When this circuit fails, it can cause problems with shifting gears, as the transmission may not be able to shift into the correct gear. This can result in a variety of symptoms, including decreased fuel efficiency, rough shifting, and even complete transmission failure.

What causes the P0771 code?

There are several main issues that could be the cause behind the issue with this code, so let’s take a closer look at each of these:

Faulty shift solenoid E

The most common cause of the code is a faulty shift solenoid E. This component is responsible for regulating the transmission fluid pressure, and if it fails, it can cause problems with shifting gears.

Wiring issues

Another potential cause of the P0771 code is wiring issues within the shift solenoid E control circuit. This can include frayed or damaged wires, loose connections, or corroded terminals.

Failed transmission control module

In some cases, the code can be caused by a failed transmission control module. This component is responsible for regulating the transmission’s operation, and if it fails, it can cause a variety of transmission-related issues.

Low transmission fluid

Low transmission fluid can also cause the P0771 code to appear. When the fluid level is low, the transmission may not be able to build the necessary pressure to shift gears properly.

Which car models does the P0771 code affect the most?

The P0771 code can appear in any vehicle with an automatic transmission, but some models are more prone to experiencing this issue than others. Some of the car models that are most likely to be affected by the code include:

• Toyota Camry: Because of the issues with an automatic gearbox in the recent Camry models, Toyota had to make a few recalls and drivers complained about seeing the mentioned code pretty often.
• Honda Accord: Another vehicle that frequently had issues with the P0771 is the 2007 to 2008 Honda Accord.
• Nissan Altima: Finally, the Altima is yet another vehicle that suffers from this code more than other vehicles due to issues with the solenoid.

How to diagnose the P0771 code

Diagnosing the P0771 code requires specialized diagnostic tools and equipment, as well as a solid understanding of the transmission system. Here are some steps that can be taken to diagnose the code:

Use a scan tool

The first step in diagnosing the P0771 code is to use a scan tool to read the vehicle’s onboard diagnostic system. This will provide information about the specific issue that’s causing the code to appear.

Check the transmission fluid level

If the scan tool indicates that the transmission fluid level is low, the first step is to check the fluid level and top it off if necessary.

Inspect the wiring

If the transmission fluid level is not the issue, the next step is to inspect the wiring within the shift solenoid E control circuit. This may require removing the transmission pan to access the solenoid.

Perform a resistance test

If the wiring appears to be intact, the next step is to perform a resistance test on the shift solenoid E. This will help determine if the solenoid is functioning properly.

Inspect the transmission control module

If all else fails, the transmission control module may need to be inspected to determine if it’s functioning properly.

How to fix the P0771 code

Fixing the P0771 code will depend on the specific cause of the issue. Here are some potential fixes for each cause:

Faulty shift solenoid E

If the shift solenoid E is faulty, it will need to be replaced. This can be done by removing the transmission pan and replacing the solenoid.

Wiring issues

If there are wiring issues within the shift solenoid E control circuit, the damaged wires will need to be repaired or replaced.

Failed transmission control module

If the transmission control module is the issue, it will need to be replaced.

Low transmission fluid

If the issue is low transmission fluid, simply topping off the fluid may be enough to fix the issue.

It’s important to note that fixing the P0771 code can be a complex and time-consuming process, and it may be best to seek professional help if you’re not experienced with transmission repairs.

How to prevent the P0771 code

Preventing the P0771 code from appearing requires regular maintenance and upkeep of the vehicle’s transmission system. Here are some preventative measures that can be taken:

• Regularly change the transmission fluid
• Keep the transmission system clean
• Have your transmission checked according to the manufacturer’s specifications

Avoiding harsh driving, such as sudden stops and starts, can help prevent issues with the transmission system.

Our take

Overall, the code P0771 is just like any other code related to the transmission and it requires your immediate attention to fix it and avoid more serious transmission issues. We hope that our guide will be sufficient to help you sort these issues out, and prevent the problem from re-occurring.