What Bobcat error codes mean and how to find yours
Bobcat error codes are diagnostic messages that appear on your machine's display when something is wrong with the engine, hydraulics, electrical system, or emissions controls. The code itself is a number or alphanumeric string — like P0101 or DPF001 — that points to a specific problem. Finding and clearing the code tells you what broke and whether it's safe to keep working.
The code appears because sensors inside your Bobcat are constantly monitoring how the machine runs. When a sensor detects something outside normal range — an engine temperature too high, oil pressure too low, a clogged filter — it triggers a fault code and usually lights up a warning symbol on your dashboard. The code stays stored in the machine's computer memory even after you shut down, so you can look it up later.
Where you find the code depends on your machine's age and model. Newer Bobcats (roughly 2010 and later) display codes on a small screen built into the cab. Older machines may have a blinking light pattern instead, or require a diagnostic tool to read the code at all. Either way, the code itself is the same across all Bobcat machines — P0101 means the same thing whether you own a skid steer or an excavator.
Key Takeaways
- Error codes are stored in your machine's computer and stay there until you clear them, even if you fix the problem.
- Most Bobcat codes start with P (powertrain), C (chassis), B (body), or U (network), followed by four digits that identify the exact fault.
- You can read codes yourself on newer machines using the cab display, but older machines usually need a diagnostic scanner or a dealer visit.
- Clearing a code without fixing the underlying problem means the code will return the next time you use the machine.
- Some codes require a dealer to clear because they involve emissions systems or safety features that are legally regulated.
How to read your Bobcat's error code
On newer Bobcats with a cab display, the code usually appears automatically when you turn on the machine and a fault is detected. Look at the screen in front of you — it will show a number like P0101 or DPF001, sometimes with a brief description like "Engine Coolant Temperature Sensor." Write down the exact code and any text that appears with it.
If your machine has a warning light but no display screen, you may need to count the light blinks to decode the message. The pattern of blinks — long, short, or a combination — translates to a number. Your operator manual should include a blink code chart. If you do not have the manual, a Bobcat dealer can read the code using a diagnostic scanner connected to your machine's computer port, usually located under the seat or near the engine.
Write down the code exactly as it appears. A single digit wrong means you are looking up the wrong problem. If the display shows multiple codes, write them all down — sometimes one fault triggers several codes, and fixing the first one clears the rest.
What the code letters and numbers tell you
Bobcat codes follow a standard format used across the heavy equipment industry. The first letter tells you which system has the problem: P codes are powertrain (engine, transmission, fuel system), C codes are chassis (brakes, steering, suspension), B codes are body (cab, lights, doors), and U codes are network (communication between computer modules).
The first digit after the letter narrows it further. P0 means a general powertrain problem, P1 means a manufacturer-specific problem, P2 means fuel or air metering, P3 means ignition or misfire. The last three digits identify the exact sensor or component. P0101 is specifically a mass airflow sensor problem, while P0102 is a different airflow sensor fault.
You do not need to memorize this system. Once you have the code, search for "Bobcat [your code]" online or in your operator manual to find what it means. Bobcat's official website and dealer sites publish code definitions for free. Many codes are straightforward — a clogged air filter, low coolant, a loose sensor connection — and you can fix them yourself. Others point to internal engine damage or electrical faults that require a dealer.
Steps to clear an error code yourself
Before you clear a code, fix the problem it points to. Clearing a code without fixing the fault is like silencing a smoke alarm without putting out the fire — the code will return the next time you run the machine, and you will have lost the information that helped you diagnose it.
Once you have fixed the problem, clearing the code depends on your machine. On newer Bobcats with a cab display, look for a menu option labeled "Clear Codes," "Reset Faults," or "Diagnostics." Use the arrow buttons or touchscreen to navigate to that menu, select it, and confirm. The display will ask you to confirm the action — select yes. The code should disappear from the screen.
If your machine does not have a menu option, or if you are unsure how to navigate it, turn off the machine and disconnect the negative battery cable for 30 seconds, then reconnect it. This resets the computer and clears stored codes. However, this method only works on older machines without a backup power source for the computer memory. Newer machines retain codes even after a battery disconnect.
If the code does not clear after you fix the problem and try these steps, the fault may be more complex than it appears — a sensor that is failing intermittently, a wiring problem, or a computer module that needs reprogramming. At that point, a dealer diagnostic is the fastest route to a real fix.
When you need a dealer to clear the code
Some codes cannot be cleared without a dealer because they involve emissions systems, safety features, or computer modules that are legally regulated. If your code starts with P04, P05, P06, or P07, it is almost certainly an emissions fault — catalytic converter, diesel particulate filter, selective catalytic reduction system — and most dealers will not clear it without proof that the component was replaced or repaired by a certified technician.
Similarly, if you see a code related to the engine control module (ECM), transmission control module (TCM), or hydraulic control module (HCM), the dealer may need to reprogram the module or update its software before the code will clear. This requires specialized equipment and training that most independent shops do not have.
Safety-related codes — brake system faults, steering sensor errors, rollover protection system faults — also usually require a dealer visit. These systems are tied to your machine's structural integrity and operator safety, and clearing them without fixing the underlying problem could put you at risk.
Common Bobcat codes and what they mean
P0101 is a mass airflow sensor fault, usually caused by a clogged air filter or a sensor that needs cleaning. This is one of the easiest codes to fix yourself — replace or clean the air filter, clear the code, and it usually does not return.
P0128 is a coolant thermostat problem, meaning the engine is not reaching its normal operating temperature. This can be a stuck thermostat, a bad temperature sensor, or low coolant level. Check your coolant first — if it is low, top it off and see if the code clears. If the level is normal, the thermostat or sensor likely needs replacement.
DPF001 or similar DPF codes mean your diesel particulate filter is clogged. On newer machines, the filter regenerates automatically during normal operation, but if the code persists, you may need to force a manual regeneration cycle or have the filter cleaned by a dealer. Running the machine under load for 20 to 30 minutes sometimes clears this code on its own.
C0050 and similar C codes usually point to brake system faults — low brake fluid, a worn brake pad sensor, or a hydraulic leak. These are safety-critical and should be inspected by a dealer before you clear the code.
How to prevent error codes from coming back
Most error codes come back because the underlying problem was not fully fixed, or because a new problem developed. Regular maintenance prevents many codes from appearing in the first place. Change your air filter every 250 to 500 hours of operation, depending on how dusty your work site is. Check your oil level and coolant level before each shift. Keep your fuel tank full to prevent water from condensing inside the tank.
If a code clears and then returns within a few hours of operation, the fix did not stick. A sensor connection may be loose, a filter may not have been installed correctly, or the component itself may be failing. Do not ignore a code that comes back — it is telling you something is still wrong.
Keep a record of every code that appears and what you did to fix it. Over time, you will notice patterns — certain codes appearing in cold weather, or after the machine sits unused for a while. These patterns help you predict problems before they become serious.
Frequently Asked Questions
Can I drive my Bobcat with an error code showing?
It depends on the code. A mass airflow sensor fault or a minor emissions code usually means you can keep working, though your machine may run less efficiently. Safety-related codes — brake faults, steering sensor errors — mean you should stop and have the machine inspected before you use it again. When in doubt, check your operator manual or call your dealer.
What does it mean if the same code keeps coming back?
The underlying problem was not fully fixed, or a related component is also failing. If P0101 keeps returning after you cleaned the air filter, the mass airflow sensor itself may be bad and need replacement. Have a dealer run a full diagnostic to find what is still wrong.
Do I need special tools to read a Bobcat error code?
Not on newer machines with a cab display — you can read the code right there. On older machines without a display, you need a diagnostic scanner, which your Bobcat dealer has. Some independent equipment shops also have scanners that work on Bobcats. A scanner costs $200 to $500 to buy, so a dealer visit is usually cheaper if you only need one code read.
Will clearing a code affect my machine's warranty?
No. Clearing a code is a normal part of maintenance and does not void your warranty. However, if the code comes back and you did not fix the problem, the dealer may refuse to cover repairs under warranty because you ignored a known fault.
What if my machine shows a code I cannot find in the manual?
Search for the code online using your machine's model number — Bobcat publishes code definitions on its website and through dealer sites. If you still cannot find it, call your local Bobcat dealer with the code and your machine's serial number, and they can tell you what it means and whether it requires service.