You just spent money on a wheel alignment, or maybe you replaced a control arm on your LR4. The truck drives straight as an arrow now. But there's a problem.
The yellow DSC (Dynamic Stability Control) warning light is on. Even more annoying? Your turn signals won't cancel automatically when you turn the wheel.
The mechanic might tell you the sensor is "broken" and needs replacement. Don't believe them yet. In 90% of cases, the sensor is fine—it just forgot where "center" is. Here is how to retrain it using the iCarsoft LR V4.0.
The 2-Minute Fix for DSC Lights
What is the SAS (Steering Angle Sensor)?
Your Land Rover needs to know exactly which way the front wheels are pointing to make the Stability Control and Air Suspension work safely. The SAS, located behind your steering wheel, measures this angle down to the degree.
If you change the mechanical alignment of the wheels, the SAS data no longer matches the physical reality. The computer gets confused and disables the safety systems, lighting up the DSC warning.
When Do You Need an SAS Reset?
- After a Wheel Alignment.
- After replacing suspension parts (control arms, tie rods).
- After replacing the steering rack.
- If the battery was disconnected for a long time.
- If you see Code C1A00 (Control Module) or similar steering codes.
The Calibration Process (Step-by-Step)
Some older forums suggest turning the wheel lock-to-lock manually to reset it. On modern Land Rovers (Discovery 4, Range Rover Evoque/Sport), this is often insufficient. A digital calibration is required.
Step 1: Preparation
Park on level ground. Ensure the steering wheel is perfectly straight and the tires are pointing straight ahead. Engine ON.
Step 2: Connect LR V4.0
- Plug in the tool and select Service > SAS (Steering Angle Sensor) > Land Rover.
- Select your vehicle model.
- Choose "Steering Angle Sensor Calibration".
Step 3: Follow the Prompts
The tool will guide you. It typically asks you to:
- Keep the wheel straight (0 degrees).
- Press "OK" to set the zero point.
- Sometimes, it may ask you to turn the wheel 90 degrees left, then 90 degrees right, then back to center.
Once the screen says "Calibration Successful," the DSC light on your dashboard should turn off immediately.
Don't Replace—Recalibrate
A new Steering Angle Sensor costs over $300 and requires hours of labor to install. Try calibrating it first with the iCarsoft LR V4.0. It works 95% of the time.
Get Your Calibration Tool
