Possible Reasons And Solutions for Jeep Code u1411

One of the common unexpected situations while driving a Jeep is getting error codes. 

So, what is Jeep code u1411, and why it happens?  

This code happens mostly for having a bad ignition switch which can be fixed by changing the switch. Then, a bad fuel level sensor and its wiring harness are potential reasons for initiating code u1411. Replacing it with a new wiring harness and fuel level sensor will solve this issue. 

There are many more responsible reasons. So hang tight with the article to know them and get a clear vision of how to troubleshoot to get rid of this code.   

What Does Jeep Code u1411 Mean

Jeep code u1411 means Implausible Fuel Volume Signal Received. It actually a diagnostic trouble code (DTC) that appears on the onboard diagnostic system of a vehicle. 

It indicates that the fuel volume signal received by the engine control module (ECM) is outside the expected range, or that the signal is missing entirely. 

If there are issues with this communication and the powertrain control module receives an implausible fuel volume message, the U1411 code will be triggered. 

7 Possible Causes And Solutions of Jeep Code u1411

There are multiple reasons why code u1411 occurs, and the solutions need to be explained clearly. Let’s have a quick glimpse of the reasons and solutions in this section.  

Causes Solutions 
Bad ignition switch Change the switch 
Bad fuel level sensor wiring harness Check and replace the wiring harness 
Bad fuel level sensor Check, clean, and replace the sensor
Body control module shortened harness Check and replace the harness 
Poor electrical connection of the body control module Test the battery voltage and tighten the wiring harness
Faulty body control module Replace the body control module 
Faulty powertrain control module Replace the powertrain control module 

This DTC commonly appears on the Jeep Commander, Grand Cherokee 2006, 2012, and Jeep Liberty 2006 as well. Now, It’s time to look into the reasons and solutions deeply. 

Cause 1: Bad Ignition Switch

The first possible reason for code u1411 in the Jeep Grand Cherokee and Grand Cherokee 2005 is having a bad ignition switch. Basically, a faulty ignition switch can cause a loss of power or ground to the engine control module. 

Solution:

To solve the issue, you need to check the switch. If you find it damaged or faulty, you need to replace the ignition switch. However, hanging an ignition switch is not an easy task to perform on your own. 

So it’s highly recommended to go to professional assistance to do that job. However, if you insist on doing this, follow the following steps.

  • First, pry the top of the ignition off and remove the panel to access the screws.
  • Then, remove all the screws and pull out the bottom of the dash to access the cover screws.
  • Next, turn the steering wheel to access the screws that hold the cover in place.
  • Pry the cover on the side where the slit is and unsnap it.
  • To remove the key assembly, turn it to the accessory and push a rod into a hole on top of the assembly to pull out the key and slide the lock assembly out.
  • Purchase a new assembly and slide it in until it snaps, then test the key to ensure it works.
  • Reassemble the cover and the bottom piece, tightening all screws to prevent them from falling off.

You can also take help from this video.

Cause 2: Bad Fuel Level Sensor Wiring Harness

The fuel level sensor wiring harness is responsible for transmitting the signal from the fuel level sensor to the ECM. 

If the wiring is damaged or the connectors are loose or corroded, this can cause a poor connection and prevent the signal from being transmitted.   

Solution:

To solve the issue, you need to follow the diagnostic steps to find out if the code is coming out for the wiring harness or not. 

  1. Inspect the fuel level sensor wiring harness for damage such as cracks, breaks, or corrosion. Pay particular attention to any areas where the wiring is exposed, such as where it runs along the underside of the vehicle.
  2. Now, you need to check the connectors on the wiring harness for signs of damage.
  3. Then, use a multimeter or similar diagnostic tool to test the wiring harness for continuity and resistance.
  4. Most of the time, the wiring harness can become damaged or degraded over time. In such cases, it’s advisable to replace the harness with a new one. 

It’s important to ensure that the replacement harness is compatible with the fuel level sensor to avoid any further issues. Since replacing the harness is a complex job, contacting a professional is recommended.

Cause 3: Bad Fuel Level Sensor

If the fuel level sensor is defective, it won’t be able to send an accurate fuel volume message to the powertrain control module. It can cause the electronic control system to detect an implausible fuel volume message triggering the U1411 code.

Solution:

To solve this issue, carefully examine the fuel level sensor for corrosion or blockages and clean it if it’s dirty. 

You can clean the fuel level sensor just by following the steps below.

  1. First, locate the fuel level sensor and remove the fuel level sensor carefully from its position. The fuel sensor is located in the fuel tank and consists of a float; usually made of foam and connected to an actuating metal rod; attached to a variable resistor.
  2. Then, clean the sensor with a cleaning solution and with a soft brush. Make sure all dirt, debris, and corrosion have been removed. 
  3. Finally, make sure the sensor is completely dry before attaching it to its position.  

After cleaning, make sure there is enough fuel in the tank, as low fuel levels can also trigger the code. 

If cleaning the sensor does not resolve the problem or you observe any physical damage, the sensor should be replaced. The replacement job is costly enough, it can cost around $500 all included. So, visit a mechanic as soon as possible as DIY is not a feasible option for this issue. 

Cause 4: Body Control Module Shortened Harness

The body control module is crucial in transmitting the fuel volume message to the powertrain control module. A faulty and shortened wiring harness can negatively affect the performance of the body control module.

Solution:

Shortened wiring harnesses are often the result of an electric short circuit, so the first step is to visually inspect the harness in your Jeep.

So, if the wiring harness is in poor condition or damaged, it must be replaced as there are no alternative ways to repair it. A shorted harness can also cause the body control module to malfunction. Consult a professional as this replacement job is quite difficult. 

Cause 5: Poor Electrical Connection of the Body Control Module

Poor electrical signal of the body control module of Jeep Liberty can initiate the code u1411. If the body control module does not power up correctly, it will not be able to receive input from various electrical devices, such as the fuel level sensor.

Solution:

To get over the situation, you need to ensure that the body control module is receiving the necessary power and has a secure electrical connection to avoid triggering the U1411 code. 

So, follow the guidelines given below.

  1. First, check the body control module’s wiring harness, you should ensure that the wiring is tightened properly and in good condition. Check the previous solution for damaged wiring.
  2. Then, test the battery voltage to ensure it generates enough power for the body control module. You need to recharge the battery if the voltage is below 12.6 volts

Cause 6: Faulty Body Control Module

Even after exploring all the reasons and solutions, if the issue still persists, the chances of having a defective control module are high.  

Solution:

If you find the body control module is faulty, you can’t do anything other than replace the body control module. A new BCM can cost around $500. Follow the video tutorial to know about the replacement procedure.

Cause 7: Faulty Powertrain Control Module

Another significant reason is having a defective PCM. Even if the fuel level sensor and body control module are functioning correctly, a faulty PCM cause the code U1411.

Usually PCM malfunctions due to short circuits, extreme rust, corrosion, and thermal stress.   

Solution:

To fix this situation, you need to visually inspect the powertrain control module, located underneath the hood on the driver’s side of your Jeep. If you find the PCM is severely damaged or worn out, it needs to be replaced as early as possible. Rough start, engine stuttering, or “check engine light” are also signs of a faulty PCM.

It’s an expensive task to replace the PCM which is around $1100. Always visit a mechanic for replacing a powertrain control module.

However, before replacing it, conduct a thorough check. It’s worth noting that if the powertrain control module is defective, the engine may stall.

How Long Can You Drive With u1411?

Driving your car with the u1411 code won’t cause any harm to your engine or any other components.

Usually, this code itself does not affect the drivability of the vehicle, so you can continue driving with the code present. However, it’s necessary to have the issue diagnosed and repaired as soon as possible. 

Otherwise, it could potentially affect the operation of the ABS system, which could impact the vehicle’s ability to stop in certain situations.

Frequently Asked Questions (FAQs):

Can you Solve Code U1411 by Yourself?

If you have the proper technical knowledge and the necessary tools, you can fix the code yourself. However, fixing this code requires expertise. So it’s recommended that you go to a professional mechanic to fix this issue. Otherwise, things might get harder.  

How do I find my DTC code?

You need a diagnostic connector and a DTC scanner to extract and read DTC fault codes. DTC code readers display one-line descriptions of codes or include definitions. In vehicles manufactured before 1996, diagnostic connectors aren’t universal, so you may need a specific adapter. Connectors on newer cars are usually the same.

Does disconnecting the battery clear codes?

Yes, usually it does. If you disconnect the battery for a few minutes, the vehicle system will reset entirely when you reconnect it. Afterward, reconnect the negative cable to the terminal and cover it with the cap. This action will clear any error codes and reset the check engine light.

Conclusion

I hope you tracked down the possible causes of the Jeep code u1411. This article is an attempt to determine the solutions as well in a descriptive manner. 

It is advisable to seek assistance from a qualified mechanic. While addressing the U1411 code, make an effort to resolve the problem in a manner that prevents it from recurring frequently. All the best. 

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