How to Read Clear DTCs Fault Codes on a Rolls Royce

This guide will teach you how to read and clear fault codes from a Rolls Royce vehicle. There are almost a hundred warning lights that could illuminate your dashboard; these include ABS, SRS, transmission temperature, oil pressure, battery charging, differential, traction control, and many more. We will show you how to use the YOUCANIC full system scanner to read and clear the codes.

DTCs (Diagnostic Trouble Codes) are like tiny SOS signals from your car’s intricate electronic system. They alert you to potential issues that could lead to serious problems if left unchecked. Ignoring DTCs is like ignoring a persistent cough; it could be a sign of a more serious underlying ailment.

Procedures for reading DTCs/Fault codes

We’ll delve into details on how to read and erase fault codes on all Rolls-Royce models, which includes the common models like Wraith, Ghost, Cullinan, Phantom, Dawn, and many more models. Here are the steps for reading DTCs/Fault codes on your Rolls-Royce:

1. Gather the necessary tools: Equip yourself with a Professional-Grade OBD-II Scanner compatible with your Rolls-Royce. Click Here for our Professional-Grade YOUCANIC Scanner
2. Access the OBD-II Port: This port is usually found under the dashboard, near the steering column; the OBD-II port is the gateway to your car’s diagnostic information. Turn the ignition key to the “ON” position without starting the engine to make a connection with the vehicle’s computer. If your Rolls-Royce has a START/STOP feature, press the button without pressing the brake pedal. Do not start the engine. If you are unsure of the OBD-II port of your vehicle, you can always check the Car Owner’s Manual.
3. Access the Diagnostic Menu: On the YOUCANIC scanner’s display, navigate to the “Diagnostic” or “Scan” menu. This menu allows you to access various diagnostic functions for your Rolls-Royce.
4. Select ‘ROLLS-ROYCE’ as the Vehicle Make: This ensures the scanner effectively communicates with the Rolls-Royce On-Board Diagnostic system and effectively scans the fault codes.
5. Select option for model selection: The scanner has various options; you can choose SmartVIN to detect your vehicle automatically. However, you choose Manual Selection if SmartVIN does not work as intended.
6. Select the Specific Model and Chassis: After selecting the vehicle make, scroll through the available models and select the correct one for your Rolls-Royce. Choose the corresponding chassis or body type to properly sync the scanner to your vehicle.
7. Select Control Units: Once you have selected the model and chassis, the scanner will let you choose between “Quick scan” or “Control Modules”. Control Modules display a list of control units or modules in your vehicle. Examples include the engine control module (ECM), transmission control module (TCM), and ABS control module. Choose the specific module you want to diagnose. Otherwise, you can also choose the  “Quick Scan” to check everything.
8. Interpret the Codes: Once the YOUCANIC scanner completes the code retrieval process, the displayed codes will provide information about specific issues detected by the control unit. Take note of these codes for further analysis and diagnosis. Each DTC consists of a letter and four numbers. The letter indicates the system affected, while the numbers describe the issue more specifically. Click here to learn more about fault codes.
9. Erase Codes: After the problem has been repaired, return to the scanner’s menu and select the option to “Erase Codes” or “Clear Codes.” This action removes the stored fault codes from the control unit’s memory, indicating that the problem has been resolved. Please take note that you may or may not erase a code when the issue is not fixed.

NOTE: These pictures are just the demo of our YOUCANIC Scanner, it may or may not be exactly the same but the procedure is the same.

With the help of our YOUCANIC Scanner, you can easily identify and erase fault codes, enabling you to diagnose and address vehicle problems in a methodical and streamlined manner, or you can ask a technician to help you with a more complex mechanical issue.

I can’t clear DTCs/Fault Codes

Once you’ve identified the DTCs, you may be tempted to clear them, hoping to continue driving your Rolls-Royce and the problem magically disappears. While clearing the codes can temporarily remove the “Check Engine” light, it doesn’t address the underlying issue. It will always come back. Here are also some lists of why you cannot clear the codes of your Rolls-Royce:

• Use a Professional-Grade Scanner: Ditch the generic scanner and upgrade to a professional-grade one like YOUCANIC. Generic scanners are like trying to open a Ferrari with a Ford key – it won’t work! YOUCANIC, on the other hand, is like the master key to your Rolls-Royce’s diagnostics, unlocking hidden diagnostic powers and letting you clear codes that would otherwise remain stubborn and hidden.
• Underlying Issues: Before clearing fault codes, remember to address the underlying issue that triggered them in the first place. Clearing codes is like patching a leaky pipe without fixing the cracked valve – it’s just a temporary fix. The ‘check engine’ light will surely come back and haunt you.
• Continuous Fault Monitoring: Certain fault codes, like the SRS system may be cleared by disconnecting the battery (like a reset). They will reappear even after clearing until the root cause is resolved. Think of it as a persistent reminder to fix the problem, not just mask it.
• Proper Clearing Procedure: It’s essential to follow the correct steps outlined in your diagnostic scanner’s user manual to clear fault codes effectively. If unsure about the clearing procedure, consult a professional for guidance specific to your scanner and Rolls-Royce model.

YOUCANIC Full System Car Diagnostic Scanner

The Unseen Culprits: History, Current, and Stored DTCs

1. History: These codes indicate past issues that have resolved themselves or are no longer causing the “Check Engine” light to illuminate. They typically do not require immediate attention.
2. Current Codes: These codes represent the current or active problems that require immediate diagnosis. It indicates a present issue or malfunction in a specific system or component of the vehicle that needs to be addressed. They will remain displayed until the underlying issue is resolved.
3. Stored Codes: These codes are inactive but remain stored in the computer’s memory, serving as a record of previous issues. These can provide additional information about past issues as a historical reference for previous faults. While they may not be active, they can offer insights into the vehicle’s history and aid in the diagnostic process.

To learn more about fault codes, read our article here

What are Live Data and Freeze data? Why do they matter?

Live data allows you to monitor real-time sensor readings, providing valuable insights into the car’s operation. On the other hand, Freeze frame data captures a snapshot of vehicle conditions when a fault code is triggered. Analyzing this data provides context and aids in pinpointing the root cause of the issue.

Frequently Asked Questions:

Remember, your Rolls-Royce deserves the best care, and understanding DTCs is a crucial step in maintaining its peak performance and ensuring your driving pleasure remains uninterrupted

References:

1. What Is an OBD2 Scanner and How Does It Work?
   What Is an OBD2 Scanner and How Does It Work? | The Drive
2. DTC Fault Codes
   DTC Fault Codes – YOUCANIC
3. What Does the Check Engine Light Look Like, and What Does It Mean?
   What Does the Check Engine Light Look Like, and Really Mean? – Consumer Reports
4. Current / Stored / Active / Past / History Fault Codes Explained
   Current / Stored / Active / Past / History Fault Codes Explained – YOUCANIC

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