Troubleshooting Range Rover ESP and HDC lights (U0428 & U0126)
Table of Contents
- Introduction
- Identifying the Problem
- Inspection of the Car
- Analysis of the Faulty Lights
- Auto Scan Results
- Modules of Concern
- Permanent and Temporary Faults
- The Role of the Transfer Case Control Module
- Misalignment of the Steering Angle Sensor
- Steering Angle Sensor Calibration
- Erasing Faults and Test Drive
- Conclusion
Introduction
🚗🔧 Welcome to another video! In today's video, we will be discussing a 2008 Range Rover Land Rover with a 2.7-liter diesel engine. This vehicle seems to have an issue with three warning lights, and our task is to identify and resolve the problem. So, let's begin our investigation and get to the bottom of this mystery!
Identifying the Problem
Our first step is to determine the source of the issue. The owner of the car informed us that the three lights sometimes come on when the vehicle is driven, while other times they remain off. Two of these lights seem to be the primary concern, and we'll focus on them in our analysis.
Inspection of the Car
To start our investigation, we conducted a thorough inspection of the vehicle's exterior. We noticed that the brake wear sensors, specifically the brake pads wear sensors, may be causing the problem. The rear discs appear to be brand new, while the front discs also look relatively new. Despite their condition, we suspect that there may be an issue with the sensors, which may have been refitted improperly.
Analysis of the Faulty Lights
Now let's delve into the details of the two troublesome lights. Although they don't consistently come on every time the car is started, they do illuminate after a short period of driving or when the car is stationary. This inconsistency hints at a potential underlying issue that we must address.
Auto Scan Results
To save time and streamline our investigation, we decided to run an auto scan on the vehicle. The scan revealed several faults related to various modules. However, our primary focus lies on the modules associated with the steering angle, dynamic control, and right level control.
Modules of Concern
Among the faults detected, we found permanent faults with the steering angle sensor, transfer case control module, and dynamic control module. The remaining faults seem to be temporary in nature. Considering their interconnectivity, we suspect that these faults are all related and may be causing the issue at hand.
Permanent and Temporary Faults
Permanent faults raise serious concerns as they require immediate attention. The permanent fault codes were as follows: U0428-81 (invalid data received from steering angle sensor), U0126-87 (lost communication with steering angle sensor), and others. It is essential to address these permanent faults promptly to resolve the underlying issues.
The Role of the Transfer Case Control Module
Of particular interest is the transfer case control module, which has lost communication with the steering angle sensor. This module plays a crucial role in determining the appropriate drive mode based on the steering angle. The loss of communication between these components may be contributing to the issue we are troubleshooting.
Misalignment of the Steering Angle Sensor
Further investigation revealed a misalignment of the steering angle sensor, which could explain the intermittent appearance of the warning lights. The steering angle reading showed 5773 degrees, significantly deviating from the correct zero position. As we turned the steering wheel, the angle reading did not correspond accurately with the wheel's position.
Steering Angle Sensor Calibration
To rectify the misalignment issue, we performed a steering angle sensor calibration. This process aims to recalibrate the sensor and ensure accurate readings. By pressing the appropriate buttons and setting the ignition to position two, we were able to initiate the calibration. Upon completion, the warning lights disappeared.
Erasing Faults and Test Drive
After the calibration, we chose to erase all the fault codes and modules. This allowed us to monitor whether any faults would reappear. Most of the faults seem to have been resolved, except for a minor system pressure issue related to the discharged air conditioning.
Following the fault erasure, we embarked on a test drive to confirm the success of our repairs. Driving for approximately half an hour, we tested various programs and found no warning lights or malfunctions. The steering, suspension, and other systems were working perfectly, providing a smooth and comfortable ride.
Conclusion
In conclusion, the root cause of the problem in the 2008 Range Rover Land Rover was a misaligned steering angle sensor. After performing a calibration, erasing faults, and conducting a test drive, we observed that all systems were functioning correctly. It appears that this issue is now resolved, ensuring the safety and performance of the vehicle.
We hope you found this video informative and helpful in understanding the troubleshooting process for such automotive issues. If you have any questions or comments, please don't hesitate to leave them below. Thank you for watching, and until next time, drive safely!
Highlights:
- The 2008 Range Rover Land Rover with a 2.7-liter diesel engine has been experiencing issues with three warning lights.
- An inspection revealed potential problems with the brake wear sensors.
- Auto scan results identified faults in several modules, particularly those associated with the steering angle.
- Permanent faults with the steering angle sensor and related modules required immediate attention.
- Misalignment of the steering angle sensor was discovered as the root cause.
- Calibration of the steering angle sensor resolved the issue and eliminated the warning lights.
- Test drive confirmed the successful resolution of the problem, ensuring the vehicle's safety and performance.
FAQ
Q: Are the warning lights always illuminated when driving the vehicle?
A: No, the warning lights are not consistently illuminated. They may come on when the car is driven or remain off at times.
Q: Were there any other faults detected during the auto scan?
A: Yes, several faults were detected in various modules, but our focus was primarily on those related to the steering angle.
Q: How was the misaligned steering angle sensor resolved?
A: The misalignment was rectified through a calibration process, which realigned the sensor and eliminated the warning lights.
Q: Did any faults reappear after erasing them?
A: Most faults were resolved and did not reappear, except for a minor system pressure issue related to the air conditioning.
Q: Did the test drive confirm the effectiveness of the repairs?
A: Yes, the test drive yielded positive results, with no warning lights or malfunctions observed. The vehicle performed smoothly and comfortably.
