P1744 Slip Solenoid System

How to Diagnose and Solve P1744 Slip Solenoid System Issues

As a car enthusiast, there’s nothing more satisfying than rolling up your sleeves and getting your hands dirty to fix a car problem. Today, we’re going to delve into the world of P1744 Slip Solenoid System issues. This is a common problem that can cause your vehicle to perform poorly, but with the right knowledge, you can diagnose and solve it yourself.

Understanding the P1744 Code

First things first, let’s understand what the P1744 code means. This code is a generic powertrain diagnostic trouble code (DTC), which indicates a problem with the torque converter clutch (TCC) solenoid circuit. When this code appears, it means that the powertrain control module (PCM) has detected an abnormality in the TCC solenoid electrical circuit for a specific engine bank.

What Causes the P1744 Code?

The P1744 code can be triggered by several factors. These include a faulty TCC solenoid, damaged or corroded wiring, a malfunctioning PCM, or a low transmission fluid level.

Recognizing the Symptoms

Before we dive into the diagnosis and solution, it’s crucial to recognize the symptoms associated with the P1744 code. These may include a decrease in fuel efficiency, difficulty shifting gears, a slipping transmission, or your check engine light may illuminate.

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Diagnosing the P1744 Code

Now that we’ve covered the basics, let’s move on to diagnosing the issue. You’ll need an OBD-II scanner to read the trouble codes. Connect the scanner to your vehicle’s diagnostic port, usually located under the dashboard. Once connected, the scanner will display any trouble codes, including P1744 if it’s present.

Steps to Solve P1744 Slip Solenoid System Issues

Step 1: Check the Transmission Fluid

The first step in solving P1744 issues is to check your transmission fluid level. If the fluid level is low, it could be causing the P1744 code. Refill the fluid to the appropriate level and see if the problem persists.

Step 2: Inspect the Wiring

Next, inspect the wiring around the TCC solenoid and PCM. Look for any signs of damage or corrosion. If you find any, repair or replace the wiring as necessary.

Step 3: Replace the TCC Solenoid

If the fluid level is correct and the wiring is in good condition, the issue may lie with the TCC solenoid itself. In this case, you’ll need to replace the solenoid.

Step 4: Check the PCM

Finally, if all else fails, the problem could be with the PCM. This is a more complex issue that may require professional assistance.


Diagnosing and solving P1744 Slip Solenoid System issues can be a bit challenging, but with the right tools and knowledge, it’s definitely doable. Remember, always start with the simplest solutions first, like checking the transmission fluid and wiring, before moving on to more complex tasks like replacing the TCC solenoid or PCM.


1. What is the P1744 code?
The P1744 code is a diagnostic trouble code that indicates a problem with the torque converter clutch solenoid circuit.

2. What are the symptoms of a P1744 code?
Symptoms may include decreased fuel efficiency, difficulty shifting gears, a slipping transmission, or an illuminated check engine light.

3. How can I fix a P1744 code?
You can fix a P1744 code by checking the transmission fluid level, inspecting the wiring, replacing the TCC solenoid, or checking the PCM.