You see an alert on the dashboard of your vehicle saying “C121c Torque Request Signal Denied.”. What does it mean? There is no need to feel alone.
First time error codes or alerts can be confusing. This type of message needs to be handled appropriately and eliminated in the future.
Throughout this guide, you will gain an understanding of the C121c Torque Request Signal Denied error message. The cause of this error code will also be discussed, as well as how to identify the problem yourself. You can learn how to remove these error codes from your computer by checking out the following article.
What Does The “C121c Code” Mean?
A C121c code will appear on your system’s screen as soon as the ABS module receives your message and performs all required functions to determine that there is a problem with the system that prevents traction control from working.
Therefore, an alert will appear indicating that C121c torque signal request has been denied.
How Does The C121c Torque Request Signal Denied Alert Occur?
The “C121c Torque Request Signal Denied” message isn’t a problem for those who haven’t seen it before.
Two main reasons may lead to you seeing this alert message. In the following sections, we explain both in more detail.
Anti-lock brake module problem
You may receive this alert message if your anti-lock brake module is malfunctioning. This microprocessor controls the anti-lock brake module in your vehicle.
During the diagnostic procedure, the antilock braking system as well as the hydraulic brake system and wheel sensors are inspected. If you want to release brake pressure without skidding, make sure the car is locked at the right time.
The traction control system will not work properly if the ABS control module malfunctions, leading to a warning message such as “C121c Torque Request Signal Denied”.
Powertrain Control Module Issue
You may also receive this alert message if your vehicle’s PowerTrain Control Module (PCM) is malfunctioning.
PCMs perform a variety of functions based on the data they receive from sensors in your car. Problems with the PCM may occur if any of these systems or sensors fail.
When your traction control system malfunctions, an error alert appears on your dashboard.
C121c Torque Request Signal Denied Reasons
C121c alert messages are a result of both of the above causes, but it is still difficult to pinpoint the specific cause of the problem. The problem can be determined using three simple methods.
DTC Check
The following steps will help you determine if an ABS module problem is causing the error message.
In order to determine whether the ABS module was the problem, you can now monitor the ESP Torque Request status.
PowerTrain DTCS Check
Recording DTCs for Powertrains using method 1 is similar to recording DTCs using method 2. It is possible that you will receive an alert message on your vehicle if you proceed with this.
ESP Torque Request Signal Check
If you are experiencing a C121c Code error on your computer, you can diagnose it by following these steps:
C121c Torque Request Signal Denied: Solutions
It’s time to fix the alert message now that we have understood the causes and two methods of determining the actual cause.
ABS Module
You should fix the ABS module first, as it is one of the main causes of this alert message.
Since repairing the ABS module is a complicated process, you cannot do it yourself. There can be no overstatement of the importance of professional assistance.
An ABS module consists of two main components: wheel speed sensors and a control module. A total of $1,500 to $3,000 will be required to replace these parts.
It is not necessary to hire a professional to install a new ABS control module. If you want to replace the ABS control module, here is a YouTube video guide you might find helpful. The cost of replacements will be reduced as a result.
PCM
The Powertrain Control Module might also be malfunctioning, resulting in “C121c Torque Request Signal Denied”. Having determined that this error message alert is caused by PCM damage, your first step should be to get your vehicle’s PCM checked at a nearby garage.
Firstly, the PCM should be repaired before a replacement is considered. In fact, more than half of the Powertrain Control Modules that were replaced needed some repair. If you need to repair the PC module, you should consult a trustworthy mechanic.
Damaged Connector Pins
The connector pins may also need to be checked for damage in order for your system to display without error messages. C121c error messages are usually caused by bent or corroded connector pins, which prevent the traction control system from working.
To avoid giving up, always check the connector pins for damage and replace them if necessary.
Can you tell me how much it costs to diagnose code C121c?
There is no one formula that can be used to estimate the cost of diagnosing Code C121c, as it varies depending on several factors. You need to consider your vehicle’s make, model, labor rate, and how much diagnostic work you need. It is possible to charge between $80 and $150 per hour for professional automotive diagnostics.
To determine the cost, it may be necessary to analyze the problem in depth and purchase specialized equipment. It is also important to take into account the costs associated with repairs and replacement parts.
The details of your vehicle as well as the symptoms observed can help your local auto repair shop provide an accurate estimate. In this way, it is possible to more accurately estimate the diagnostic costs of code C121c.
Why Do Fault Codes Exist?
A diagnosis trouble code (DTC) is a digit that identifies an abnormality in a vehicle’s components.
In modern vehicle diagnostics, diagnostic codes are often used to identify performance problems.
A vehicle’s fault codes are generated by sensors that detect irregularities throughout its system.
These codes can be retrieved from your vehicle’s computer using specialized tools, such as OBD-II scanners.
By coding, problems can be identified during diagnostics. There are specific problems or malfunctions represented by the codes.
What Does C121C Mean On A Mitsubishi Outlander?
C121C codes are caused by problems with either EBCMs (Electronic Brake Control Modules) or ABSs (Anti-Lock Braking Systems). A Torque Request Denied Signal is indicated by C121C, in particular.
This code is often displayed when the ABS module malfunctions, resulting in malfunctioning antilock brakes and traction control. The stability and safety of a vehicle can be compromised when there is a problem with the ABS module.
The C121C code can be diagnosed with an OBD-II scanner to pinpoint the exact cause and solution.
To determine what repairs or adjustments are necessary, it is necessary to examine the code’s specific conditions.
In the event of not having any experience with automotive diagnostics, it is advised to consult a qualified mechanic.
Is There A Way To Fix Code U1424?
U1424 is the result of a communication issue between the vehicle dynamics controller (VDC) and the vehicle. This module is an integral part of the vehicle’s stability control system. U1424 can be resolved by following these steps:
Scan Diagnostics
If the U1424 code is caused by specific conditions, an OBD-II scanner can help you figure out what those conditions are. In this way, the root cause of the problem will be identified.
Check The Wiring And Connections
Make sure the wiring and connections on the VDC module are correct. Check the wires for corrosion or loose connections if you find either. It is important to maintain a clean and debris-free environment around all connections.
Verify Power Supply
Provide enough power to the VDC module. You should check the fuses for the stability control system. In the event that a fuse blows, it must be replaced.
Check The VDC Module
Ensure that the VDC module’s wiring and connections are in good working order. Make sure the equipment is functioning properly. It may be necessary to replace the VDC module if there are any issues with it.
Professional Assistance
It is recommended that you seek professional assistance if you are unable to diagnose and repair a vehicle. Repairs or replacements can be recommended by mechanics or dealership service centers.
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Frequently Asked Questions
What is the best way to clear my engine error code?
By using an OBD-II scanner, you can remove engine error codes. The scanner can be used to clear codes if it is connected to the vehicle’s OBD-II port. Clearing codes without addressing the underlying problem will result in recurring problems.
What is the process for clearing permanent trouble codes?
A permanent trouble code can only be cleared once the underlying problem is resolved. OBD-II scanners are usually all that is required to clear codes after repairs are completed.
What is the transmission control module error code?
It depends on the model and make of the vehicle which error code the transmission control module displays. The P0700 transmission error code indicates that the transmission control system has malfunctioned. It is also possible to receive P0xxx codes when there is a problem with the transmission. OBD-II scanners and service manuals can help you determine the correct code.
What happens if you disconnect the battery and then reconnect it?
Disconnecting the battery may reset the check engine light, but the underlying issue will remain. If the root cause of the problem persists, the light is likely to return after reconnecting the battery. It is recommended that the check engine light be identified and fixed before the check engine light can be cleared.
How safe is it to clear engine codes?
Clearing engine codes can be done in a safe way, but you must first resolve the underlying problem. It is possible to encounter persistent or recurring issues in the future after clearing the codes without resolving the problem. In order to prevent ongoing problems, ensure you have repaired all the necessary items before clearing the codes.
When do engine codes reset?
A vehicle’s computer may take several drive cycles to complete the necessary self-checks following resolution of the underlying problem and clearance of the codes with an OBD-II scanner. Prior to completely resetting the system, the computer evaluates its health under a variety of driving conditions.
Conclusion
Your vehicle’s computer system may display the error message C121c for a number of reasons. A diagnostic method and some advice for resolving the issue have also been provided.
You might want to try these fixes if you want to remove the error alert. The errors you see on your screen should no longer concern you after reading this guide.