C1AC1 2013 Toyota RAV4 Code - Master Module Horizontal Axis Misalignment

The code C1AC1 indicates a "Master Module Horizontal Axis Misalignment," which means the system has detected an issue with the alignment of the forward recognition camera or sensor.

Common symptoms include the malfunction indicator light (MIL) or pre-collision warning light illuminating, and possible deactivation of advanced driver assistance systems like lane-keeping assist or pre-collision braking.

This code is often caused by improper calibration of the forward recognition camera, physical misalignment due to impact or repair work, or a faulty camera or mounting bracket.

While the vehicle is typically still drivable, advanced safety features such as pre-collision and lane-keeping assist may not function properly, so it’s important to address the issue promptly.

Fixing this code typically involves recalibrating the forward recognition camera using specialized diagnostic tools or repairing/replacing any damaged components causing the misalignment.

Not necessarily. In many cases, recalibration or realignment of the camera is sufficient, but if the camera or its bracket is damaged, replacement may be required.

You’ll need a professional scan tool capable of accessing Toyota-specific codes and performing calibration procedures for the forward recognition camera.

Yes, even a minor collision or bump to the front of the vehicle can misalign the camera and trigger this code.

The cost varies depending on whether the issue requires recalibration (typically $150-$300) or replacement of the camera or mounting hardware (which can exceed $500).

You can clear the code with a scan tool, but it will likely return if the underlying misalignment or damage is not addressed.