New Shop Info: https://goo.gl/maps/HzwG98iioszjQWRP6
TAT Express Inc.
972-225-3017
4140 Langdon Rd.
Dallas TX 75241

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Step 1: Stay calm. Don't panic. The check engine light can indicate various issues, ranging from minor to potentially more serious. It's important not to ignore it."


Step 2: Consult your truck service manual. Every truck comes with a manual specific to its make and model. Refer to the troubleshooting section for the engine to identify potential causes for the check engine light."

The manual will provide you with valuable information about possible reasons for the check engine light, helping you to narrow down the issue. Pay close attention to DEF or Regen lights."

Step 3: Inspect the truck visually. Look for loose wires, disconnected hoses, or obvious signs of damage. Also, ensure the battery cables are properly tightened, as a loose cable can trigger the check engine light."

Step 4: The check engine light is usually accompanied by error codes stored in the engine control unit or (ECU). You'll need an OBD-II scanner or diagnostic tool that is compatible with your truck's system. Connect the scanner to the OBD-II port (usually located beneath the dashboard) and retrieve the error codes. These codes will help identify the specific problem areas.

Step 5 is to interpret the error codes: Once you have the error codes, you can look up their meanings in the engine's service manual or use an online database. This will give you a better understanding of the underlying issues causing the check engine light and derating. Finding the problem's root cause and paying attention to frequent fault codes is crucial.

Step 6 is to address common issues: Based on the error codes and symptoms, you can troubleshoot and address some common issues yourself. For instance, it could be a faulty sensor, an issue with the EGR valve, a clogged fuel filter, or an air intake problem. Refer to the engine's service manual for detailed instructions on diagnosing and fixing these issues.

Step 7 is to seek professional assistance: If you're unable to determine the cause of the problem or if it requires specialized knowledge and tools, it's best to take your truck to an experienced mechanic or a service center with experience working with semi-trucks. They will have the expertise and diagnostic equipment to identify and repair the issue accurately.

Remember that engine derating is a safety feature designed to protect the engine from further damage. It is crucial to address the problem promptly to prevent potential long-term consequences and ensure the proper functioning of your truck.

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New Shop Info: https://goo.gl/maps/HzwG98iioszjQWRP6
TAT Express Inc.
972-225-3017
4140 Langdon Rd.
Dallas TX 75241

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