How to Troubleshoot & Fix P1745 Jeep DTC Code? (Detailed Guide)
Imagine driving peacefully and suddenly there is a warning on the dashboard. Instead of going to a mechanic for reports, you can just connect an OBD-2 scanner to get the specific error code like the P1745 on the Jeep.
Don’t worry, though. We won’t let you decode it all by yourself. Keep reading the article to fully understand the code and how you should deal with it.
What Does P1745 Jeep Code Mean?
Error code P1745 on your OBD-2 scanner indicates that the hydraulic pressure within your vehicle’s transmission line is way too high.
A regulator keeps the fluid pressure within a certain limit for each gear. The range is around 150 psi to 220 psi.
Every 10-20 psi of difference can lead to major internal failures including slipping.
That means, when the TCM (transmission control module) gets faulty or doesn’t perform accurately, your Jeep will show an error P1745.
According to the OBD2 diagnostic chart, 45 leads us to pressure control solenoid within the transmission. So, here’s how we break down the P1745 code.
- P = OBD-II trouble code for engine’s powertrain.
- 1 = Manufacturer specific code.
- 7 = Transmission
- 45 = Pressure Control Solenoid
P1745 Code: What Causes Hydraulic Pressure to Increase So Much?
P1745 stands for irregular pressure within the transmission line. As we all know, a TCM (transmission control module) is designed to balance out the actual pressure of the transmission line.
In simple terms, the difference between the real and ideal pressure shouldn’t exceed more than 10 psi (ideally).
Not attending to the issue can slowly lead to harsh shifts, high fuel temperature, inability to change gears while driving, and so on.
For now, let’s see what causes the increase in transmission line pressure of your jeep.
- A faulty pressure control solenoid
- Insufficient supply of current to the TCM
- Harness/loop open in the solenoid
- Clogged Transmission line
Read Also: How to Troubleshoot & Fix P0522 Jeep DTC Code? (Detailed Guide)
How to Troubleshoot & Fix P1745 Jeep DTC Code?
Luckily, troubleshooting the P1745 code is not that difficult. You don’t have to replace the whole transmission anymore.
Here are five easy methods you can try the next time your jeep shows a P1745 code.
1. Maintain the Fluid Quality & Level
Start by checking the fluid inside the oil pan. The transmission fluid color tells you a lot about its inner condition. For example, a thick black consistency is a red flag.
It means that apart from the pressure regulator, the transmission is having trouble with a clogged filter as well.
As a result, the fluid running across the engine is full of debris, causing numerous types of issues, including misfires.
So, make sure you clean up the filter properly. If you find the filter in a good condition, it might be the fluid itself.
Low-quality fluid tends to decompose pretty fast. It’s your call to switch to a high-quality one.
Read Also: How to Troubleshoot & Fix P0480 Jeep DTC Code? (Detailed Guide)
2. Check the Electrical Connection
Sometimes, changing the fluid type and filter would do the trick. But if it’s not enough, the next step is to suspect a bad electrical connection.
Even the external parts of the transmission, like the connector pins, and wires, can lead to such errors.
It mostly happens due to corroded or broken electrical parts. What it does is mess up the electricity supply required for a gear change.
You might already know; change in electricity supply increases or decreases the line pressure of any transmission.
As you push the gear, you are doing nothing but sending that current supply that impacts the line pressure.
Here is a list of required PCS current supplies for a certain amount of line pressure.
As you can see, the wrong supply of power can easily lead to a high or low-pressure level inside the transmission line.
What you need to do is, clean up the corrosion/rust and make those pins work efficiently again. White vinegar works great for dissolving corrosion.
If they are broken or have dents, you have no other option but to replace them with a new set.
Of course, it’s possible to carry out the task by yourself. But it can be hard to find the right one.
If you don’t want to take chances, we suggest you stick with a professional mechanic. It shouldn’t cost more than $50 to $100, excluding the cost of new equipment.
Read Also: How to Troubleshoot and Fix Jeep B2204-00 DTC Code?
3. Replace the Solenoid
After you have gone through the first two methods, it’s time to replace the pressure regulator completely.
It is the most straightforward method. Some people prefer to go for it on the first attempt.
However, since it’s a little costly and tedious, see whether you can fix the issue with the previous methods.
Now, coming to the point, you would need a professional toolkit with all the right gears for replacing the solenoid.
Empty out the transmission fluid using a funnel. Next, loosen up the transmission pan with a 10-millimeter socket.
You will see the PCS after a quick scan. Remove them and place the new ones carefully.
There you go! The problem should be fixed by now. But keep in mind to match the current vehicle’s PCS specification while buying.
However, making such a change requires a thorough inspection. So, make sure you are using a proper OBD-2 scanner before anything.
Read Also: How to Troubleshoot and Fix P0344 Jeep DTC Code? (Detailed Guide)
FAQs.
It’s okay to not be familiar with the manufacturer-specific codes. As long as you have your scanner with you, there’s no need to memorize the entire chart.
Check out our small FAQ section filled with interesting queries from users regarding the P1745 code.
Can you drive a Jeep with the P1745 code?
How much does it cost to fix Jeep P1745 code?
Does the P1745 error code cause leakage?
Conclusion
Vehicles are only getting smarter by each day. The inner components are connected to a computerized program in your vehicle.
Any issue within the engine or otherwise is automatically detected and notified through a proper OBD-2 scanner.
It should notify you which code (P1745) you have to fix. The rest is easy. You either fix the pressure regulator by yourself or hire a professional to do so.
Read Also: How to Troubleshoot & Fix U1412 Jeep DTC Code? (5 Easy Steps)
