How to clear CAT forklift error codes

Posted byDaniela Fortino October 4, 2022October 17, 2022

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Clearing CAT forklift error codes on a Caterpillar lift truck can be daunting because most machines have steps that must be followed precisely. However, getting familiarized with the steps beforehand can make the process easier. This article outlines the steps to clear error codes on CAT forklifts.

For a list click here for: CAT  forklift error codes

What causes CAT forklift error codes? 

Error codes on forklifts let the operator know something’s wrong with the machine. There can be many causes for error codes, but common problems include: 

• Steering fluid levels. These codes indicate low steering fluid levels. Insufficient fluid levels can impact the steering mechanism, which poses an immediate safety risk to employees. 
• Mast problems. These codes indicate an issue with the mast (e.g., raising or lowering as expected). It may be caused by low steering fluid levels, hydraulic problems, etc.  
• Overheating. These codes show up when the machine’s temperature exceeds its limit. Overheating can be caused by a blockage that needs to be cleaned, problems with the radiator, etc. 
• Bad battery. These codes can be caused by low voltage, incorrect calibration, faulty battery, etc. These issues must be fixed to run optimally.  
• Trouble starting. Issues starting a truck could be caused by battery issues, low fuel, inadequate electricity, etc.   

Each code has a unique meaning, allowing the forklift operator to diagnose and fix the problem adequately. In some instances, the problem may be simple (e.g., clearing a blockage), and the code will remove itself once fixed. However, this may not work and will need to be cleared manually. 

What should you do when an error code on a Caterpillar lift truck appears?  

The first thing CAT forklift operators should do when they see an error code is to document as much information as possible. This includes: 

• The code (taking a picture of the code is advised) 
• What is happening (e.g., the mast is not lifting) 
• When the error happened 
• What was the machine doing when the code popped up (e.g., moving pallets) 
• If this error occurred before or occurs frequently 

Once important information has been collected, the machine should be turned off. And the forklift should not be operated until the issue is resolved. Using a forklift without fixing an error can cause unnecessary accidents/injuries or irreparable damage to the machine. 

Error codes can be found in forklift manuals or on a manufacturer’s website (examples of CAT forklift error codes here). These sources will describe the issue causing the error code. The problem may be a simple fix (e.g., topping up fluid levels) or indicate the need for more extensive maintenance. 

How to clear CAT forklift error codes  

Before manually clearing CAT error codes, it is vital to have a stopwatch handy. Specific steps are time-sensitive and may not work if not performed precisely. Below are the eight steps to clear error codes. 

1. Turn the forklift key switch on (without pressing the accelerator) and start the stopwatch at the same time. Wait three seconds.  
2. After three seconds, press the accelerator five times in succession (the pedal should be released at the end of the set). This step must be done within five seconds (or it may not successfully remove the code). 
3. Wait seven seconds after the previous step, then press and hold the accelerator for 10 seconds or more. Do this until the malfunction indicator light starts flashing. 
4. Release the accelerator pedal immediately after the malfunction light starts flashing. This step causes a self-diagnostic test to begin. The dashboard will show forklift DTC codes.
5. Ensure the pedal is released for 10 seconds or more.   
6. Next, press and hold the accelerator for 10 seconds or more to erase the results from the self-diagnostic test and clear the codes. 
7. Release the accelerator pedal and turn the key switch off. 
8. Restart the forklift engine to ensure there are no more error codes and the forklift is functioning normally. 

Preventing forklift error codes 

The best way to prevent forklift error codes is to perform regular and proper maintenance on the machine. Other ways to avoid error codes include: 

• Ensuring the battery does not show signs of damage (e.g., corrosion) and is correctly charged and connected when running. 
• Check tire pressure and condition (e.g., ensure they are not deflated or damaged). 
• Follow manufacturer guidelines (e.g., weight guidelines, oil change schedules, etc.) 
• Check steering fluid and coolant levels before operating. 
• Replace brakes of damage or softness 

List of CAT forklift error fault codes