AutoCodes – Generic – C1AC1

C1AC1 Code - Master Module Horizontal Axis Misalignment

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when the angle of the Blind Spot Monitor Sensor Left (LH) deviates more than the allowable range from the horizontal axis. Common causes include Faulty Blind Spot Monitor Sensor Left (LH). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C1AC1 indicates Master Module Horizontal Axis Misalignment.
Common causes: Common causes include Faulty Blind Spot Monitor Sensor Left (LH).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 774

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1AC1 Description

This Diagnostic Trouble Code (DTC) is stored when the angle of the Blind Spot Monitor Sensor Left (LH) deviates more than the allowable range from the horizontal axis. Suppose a drum tester such as a speedometer tester, brake/speedometer combination tester, or chassis dynamometer is used with the blind spot monitor system on. In that case, the blind spot monitor system may store this DTC by mistake.

OBDII Code C1AC1 - Master Module Horizontal Axis Misalignment - AutoCodes.com — C1AC1 Code - Master Module Horizontal Axis Misalignment

What does this mean?

What are the Possible Causes of the DTC C1AC1?

Faulty Blind Spot Monitor Sensor Left (LH)

How to Fix the DTC C1AC1?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1AC1 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1AC1 code?

Need more information on how to fix the C1AC1 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1AC1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1AC1 Lexus — Master Module Horizontal Axis Misalignment
C1AC1 Toyota — Master Module Horizontal Axis Misalignment

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1AC1 Code

1. What are common symptoms of OBDII code C1AC1, Master Module Horizontal Axis Misalignment?

- Common symptoms include steering wheel misalignment, improper alignment of the vehicle, and potential issues with the stability control system.

2. What can cause the OBDII code C1AC1 to trigger?

- The code C1AC1, Master Module Horizontal Axis Misalignment, can be triggered by a misalignment of the steering wheel angle sensor or issues with the electronic steering system.

3. How serious is the OBDII code C1AC1, Master Module Horizontal Axis Misalignment?

- This code should be addressed promptly as it can affect the vehicle's stability control system and overall driving performance.

4. Can I continue driving my vehicle with the OBDII code C1AC1 present?

- It is not recommended to continue driving the vehicle with the code C1AC1 present, as it can impact the vehicle's steering and stability.

5. How can I diagnose the OBDII code C1AC1, Master Module Horizontal Axis Misalignment?

- Diagnosing this code typically requires using a professional OBDII scanner to retrieve the code and then inspecting the steering wheel angle sensor and electronic steering components.

6. What are some repair tips for fixing the OBDII code C1AC1?

- Repair tips may include recalibrating the steering wheel angle sensor, checking and adjusting the alignment of the steering components, and ensuring proper functioning of the electronic steering system.

7. Can a DIY enthusiast fix the OBDII code C1AC1 issue?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, addressing the root cause of the Master Module Horizontal Axis Misalignment may require professional diagnostic tools and expertise.

8. How much does it typically cost to repair the OBDII code C1AC1?

- The cost of repairing the OBDII code C1AC1 can vary depending on the extent of the issue, but it may involve recalibration, realignment, or replacement of steering components, which can range from a few hundred to a few thousand dollars.

9. Will resetting the OBDII code C1AC1 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the Master Module Horizontal Axis Misalignment is not addressed, the code is likely to reappear.

10. Is it necessary to visit a dealership for repair of the OBDII code C1AC1?

- While a dealership may have specialized tools and expertise, independent repair shops with experience in electronic steering systems can also effectively diagnose and repair the issue related to code C1AC1.