C123F Code Jeep: Reasons and Solutions

Every jeep has their own specific codes which are used to notify you that something is wrong.  For example, DTC codes like c123f or u1110 etc.

So, what does C123F code Jeep mean?

Jeep code C123F may come up due to a damaged steering column or intermediate shaft. It can be also be due to incorrect positioning of steering angle sensor or improper clock spring installation. Resetting the ECU, properly installing the clockspring or replacing the clock spring can fix the issue.

That was just the preview. If you want more details in this matter, keep reading this article.

What Does Code C123F Mean On Jeep?

The code C123F means that there is an issue with the signal coming from the steering column angle sensor

Specifically, the Anti-Lock Brake Module might have detected that the estimated steering wheel angle offset isn’t within the expected range. Also, it can be that the calculated output of the steering angle signal may be out of range.

This issue can occur when there are any malfunction in the steering angle sensor. Or when the steering wheel has not properly centred, your vehicle comes up with this c123f code.

C123F Code Jeep: Reasons and Solutions

If you have a steering angle sensor code, it is important to have it diagnosed and repaired as soon as possible. A faulty steering angle sensor can cause a number of problems, including:

  • ABS malfunction
  • Traction control malfunction
  • Electronic stability control malfunction
  • Erratic steering
  • Vibrations
  • Uneven tire wear
c123f code jeep reset
Source: carnity.com

This DTC code is most frequent in these Jeep model; 

  • Jeep Grand Cherokee, 
  • Jeep Patriot, 
  • Jeep Wagoneer,
  • Jeep Compass,
  • Jeep Wrangler,
  • Jeep Wrangler Unlimited.

Now I will provide a snapshot of the possible reasons for c123f code and the possible solutions. 

Damaged steering column or intermediate shaftExamine the vehicle Reset the ECU
Incorrect clock spring installationProperly install the Jeep’s Clockspring (SAS)Clear the offsets
Incorrect positioning of steering angle sensorReplace the ClockspringRun an ABS Verification Test.

Now we will discuss the reasons and their solutions in detail here.

Reason 1: Damaged Steering Column or Intermediate Shaft

One of the reasons for this code jeep can be a damaged steering column or intermediate shaft. 


  • Firstly, carefully examine the vehicle, including the steering column and intermediate shaft, for any signs of harm. If it is damaged, get it to the professionals and get it repaired.
  • The , look into the history of any prior vehicle repairs to check if there was any damage associated to collisions. 
  • Now, turn off the ignition, then inspect the vehicle again. This is to see if there is any damage that might cause difficulties with tracking and misalignment of your steering wheel. 
  • After that go ahead and check out the steering column as well as intermediate shaft for any damage.

If the steering column is ok then, you need to reset the electronic control unit (ECU).  

Tools Needed to reset ECU

To reset the Electronic Control Unit (ECU) memory, follow these steps:

  • Open the hood of your vehicle. Find the positive battery cable connected to your battery and disconnect it.
  • After that, attach the positive battery cable with the negative one for about thirty seconds. This will discharge the capacitors and erase any electronic charge stored in them.
  • After 30 seconds, disconnect the cables and reconnect the positive battery cable. Then close the hood of your vehicle.
  • Insert the key in the ignition, but don’t start the vehicle.
  • Next, go ahead and turn on the key. Also, turn your headlights on and then turn it off immediately. 
  • Finally, turn the key off. 

Thus the ECU will be reset to its factory settings after you complete the above steps.

During the next 50 warm-up periods, the ECU will gather necessary information on your driving habits and the parts installed on your vehicle.

To ensure that everything is functioning properly, you must perform the ABS Verification Test

It is nothing complex like figuring out the difference between ms 12106 vs ms 90032.

Here are the steps to follow:

  • First of all, start by turning off your Jeep’s ignition.
  • Reconnect all components and connectors that were previously disconnected.
  • Before starting the diagnostic process, ensure that all accessories are turned off, and the battery is fully charged.
  • Firstly, check that the ignition is on and use a scan tool to clear all Diagnostic Trouble Codes (DTCs) from all modules.
  • Next, start the engine and operate the system that was showing the issue fully for two minutes. Afterward, turn off the ignition and wait for five seconds.
  • Then, turn on the ignition again and use the scan tool to read DTCs from all modules.
  • If any DTCs are still present, like jeep code u1110 etc., return to the symptom list and troubleshoot the new or recurring issue.
  • If there are no Diagnostic Trouble Codes (DTCs) present after turning on the ignition, take the vehicle for a road test for at least five minutes and perform several antilock braking stops.
  • After that, use the scan tool again to check for DTCs.

If there are no error codes and the issue the customer was experiencing cannot be seen anymore, then the repair is considered finished.

Reason 2: Improper Clockspring Installation

Another reason for this code jeep can be that the clockspring has not been installed correctly. 


The fix is even much simpler than solving a jeep compass screen lines issue.

So first, Inspect your Clockspring (SAS) Installation to prevent any serious damage on jeeps equipped with airbags. 

  • It is important that you disable the Supplemental Restraint System before 
  • trying to check any part of the vehicle. Especially the ones connected to the steering wheel, column, airbag, impact sensor, or instrument panel etc.
  • To do this, first, disconnect and isolate the battery’s negative (ground) cable. 
  • After disabling the SRS, it’s necessary to wait for at least two minutes to make sure the system capacitor is completely discharged before continuing with any further repair or inspection. This is the most trustworthy method to disable the SRS.

If the proper precautions are not taken, there is a risk of accidental airbag deployment, which could result in serious injury or death.

Proper Clockspring (SAS) installation is also very important for accurate operation. Check if your Clockspring (SAS) is correctly installed.

If not, get it repaired as needed. Make sure to initialize the Electronic Control Unit (ECU) with the wheels facing straight ahead to clear any offsets. 

To install clockspring properly, you can follow this video.

Reason 3: Incorrect Positioning of Steering Angle Sensor

This is another reason this c123f code jeep can show up.


To check the performance of the Steering Angle Sensor, use a scan tool to read its position. Do it while turning the steering wheel to the right and left. When you turn the wheel right, the position should decrease. 

And similarly, when you turn it left, the position should increase. If the steering angle changes as expected, you should replace the Antilock Brake System (ABS) Module and perform the ABS Verification Test.

If the steering angle did not change as expected, you should firstly replace the Clockspring (SAS) and then perform the ABS Verification Test.

Preventive Measures to Avoid C123F Codes

Preventing future c123f codes in a Jeep requires a combination of proper maintenance, careful driving, and proactive troubleshooting. 

Here are some tips and recommendations to help Jeep owners minimize the risk of encountering this code:

  • Regularly inspecting and maintaining the brake system, ABS module, and wheel speed sensors can help prevent c123f codes caused by wear and tear or component failure.

Checking brake fluid levels, replacing worn brake pads or rotors, and cleaning or replacing dirty or corroded sensors are all essential steps in keeping the Jeep’s braking system in top condition.

  • Avoiding sudden stops or sharp turns, as well as driving on rough or uneven terrain, can help prevent excessive wear and tear on the Jeep’s brake system and ABS module. 

Being aware of road conditions and driving defensively can also help minimize the risk of accidents that could damage these components.

  •  When replacing or installing new brake components, such as sensors or modules, it’s important to follow the manufacturer’s instructions carefully and ensure that the components are installed correctly. 
  • Using compatible, high-quality parts can also help prevent premature failure and minimize the risk of triggering a c123f code.
  • Proactive Troubleshooting is required. If a c123f code does appear, it’s important to address it promptly and thoroughly. 

By following these tips and taking a proactive approach to brake and ABS system maintenance, Jeep owners can reduce the likelihood of encountering a c123f code and ensure that their vehicles remain safe and reliable for years to come.

Frequently Asked Questions (FAQs):

What are the symptoms of a bad steering angle sensor?

When a steering angle sensor fails, your vehicle might experience different symptoms. These might contain the steering wheel being loose or the warning light appearing on the dashboard. 

What causes a steering angle fault?

Steering angle fault occurs due to the sensors which are in need of calibration. After wheel alignment or a suspension repair, your vehicles might need to have its steering angle sensor recalibrated. 

What sensor controls power steering?

The steering angle sensor usually controls the power steering. It is an element that enables it to synchronize the direction of the steering wheel with the vehicle’s wheels. This is found inside the steering column. 

Wrapping Up

Hope I have resolved all your queries about c123f code jeep.It is a potentially severe issue and needs to be addressed promptly to avoid further damage to your jeep. 

By following the tips provided in this guide you can keep your jeep  running smoothly and safely for years to come.

That is it as of now. Have an wonderful day!

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