P0773 Trouble Code: Meaning, Symptoms, Causes & Fixes

If you’re spotting the P0773 trouble code flash up on your dashboard, you’re likely searching for what it means and how to fix it.

This guide outlines everything from symptoms to solutions.

Having tackled this stubborn code myself in many repair sessions, I can guide you through a reliable fix.

This article will delve specifically into how the P0773 affects transmission performance and the steps to diagnose and resolve the issues related to it.

Now, let’s roll up our sleeves and get to work on this.

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What Does P0773 Trouble Code Mean?

The P0773 trouble code is a specific diagnostic code that points to an issue within the electrical system of your car’s Shift Solenoid “E”.

This solenoid plays a critical role in managing the fluid transfer that controls gear shifts in automatic transmissions.

When your vehicle’s onboard computer system detects an irregularity in the solenoid’s operation, whether it’s an out-of-range performance or an electrical failure, it triggers the P0773 code.

Understanding the gravity of this code is crucial. The problems leading to a P0773 can range from faulty wiring or connectors associated with the solenoid, a malfunctioning solenoid itself, or, more seriously, issues within the transmission control module.

The manifestations of this code can vary — you might experience rough shifts, slipping gears, the engine stalling during gear changes, or in some cases, the inability to shift gears at all.

The aftermath of ignoring this code can be severe. It’s not just about facing a bumpy ride; prolonged neglect can lead to significant transmission wear or even failure, necessitating costly repairs or replacements.

Upon the illumination of the check engine light alongside this code, a prompt diagnostic and repair are highly advised.

Professionals will usually start with inspecting the wiring and connections, testing the solenoid’s functionality, and assessing the transmission control module’s condition to address this issue efficiently.

Remember, the P0773 code isn’t merely a signal to an inconvenience; it’s a prompt for immediate action to prevent further damage to your vehicle’s transmission system. Address it swiftly to maintain your car’s performance and longevity.

P0773 Trouble Code Symptoms

Encountering a P0773 trouble code can significantly impact your vehicle’s performance. Here are the prevalent symptoms you might notice:

• Check Engine Light is on: This is typically the first indicator that there’s an issue.
• Erratic shifting: You might experience unexpected shifts, or the transmission may fail to shift smoothly.
• Transmission slipping: The transmission might feel like it’s slipping when changing gears.
• Increased fuel consumption: Due to inefficiencies in the transmission’s operation, you might notice your vehicle is using more fuel than usual.
• Vehicle stalls: In some cases, the vehicle might stall due to transmission problems.
• Inability to shift: Extreme cases might prevent the car from shifting into certain gears.

P0773 Trouble Code Causes

Encountering a P0773 trouble code can be concerning, but understanding its causes is the first step towards a resolution. Below are the primary reasons why this error may arise in your vehicle:

• Faulty Shift Solenoid “E”: The solenoid itself may be malfunctioning or damaged.
• Wiring Issues: Problems such as shorts, opens, or poor connections in the wiring harness leading to the solenoid.
• Bad Electrical Connections: Corroded, loose, or damaged connectors that interrupt the solenoid’s electrical circuit.
• Faulty Transmission Control Module (TCM): A malfunctioning TCM can incorrectly interpret solenoid operation.
• Low Transmission Fluid: Insufficient fluid levels can impede the proper operation of the solenoid.
• Dirty Transmission Fluid: Contaminated fluid can clog or hinder the solenoid’s function.
• Blockages in the Transmission: Physical obstructions that prevent the solenoid from operating correctly.

How To Fix A P0773 Trouble Code

Addressing a P0773 trouble code involves a combination of diagnosis and repair to pinpoint and resolve the issue. Here’s a step-by-step guide on how to do just that:

1. Use an OBD-II Scanner

Connect an OBD-II scanner to your vehicle to confirm the presence of the P0773 code and check for any other related codes. Multiple codes could indicate a more complex issue.

2. Visually Inspect the Wiring and Connectors

Check the wiring and connectors leading to the shift solenoid for any signs of damage, corrosion, or loose connections. This is a common cause of the P0773 code.

3. Inspect the Transmission Fluid

Low or dirty transmission fluid can cause issues with the shift solenoid. Ensure the fluid is at the correct level and consider replacing it if it’s dirty or smells burnt.

4. Test the Shift Solenoid

With your vehicle’s service manual in hand, locate the shift solenoid E. Using a digital multimeter, verify the solenoid’s resistance against the manufacturer’s specifications. An out-of-spec resistance reading can confirm a faulty solenoid.

5. Replace or Repair Wiring and Connectors

If the problem lies with damaged wiring or connectors, repairing or replacing them is your first step. Ensure all connections are secure and free from corrosion.

6. Clean or Replace the Shift Solenoid

If the solenoid itself is faulty, cleaning it might resolve the issue. However, in most cases, replacement is the best option. This entails removing the transmission pan (and the fluid), locating the correct solenoid (refer to the vehicle’s manual for solenoid identification), and replacing it with a new one.

7. Change the Transmission Fluid and Filter

Whether or not the transmission fluid was part of the initial problem, changing it along with the filter can benefit your transmission’s longevity and performance, especially after internal work.

8. Clear the P0773 Code

After the repairs have been made, use an OBD-II scanner to clear the P0773 trouble code. Take the car for a test drive to ensure the code does not return and that the transmission is shifting smoothly.

9. Professional Inspection

If you’re not comfortable performing these steps yourself, or if the code returns after your repair attempts, it might be time to consult a professional mechanic. There could be more intricate issues with your transmission that require expert intervention.

Conclusion

Alright, folks! You’re now in the know about what this car issue means and the fixes you can roll with.

Have you ever encountered this problem before? Share your fix!

Jump into the comments and let us know your go-to solution or any tricks we missed!