Kubota Codes

[Treedoc]

Anyone have an on-line link for identifying codes being displayed on a Kubota L3301?

Thanks in advance!

 

[JeepHead]

1. Digital "P" Codes (Diagnostic Trouble Codes)​

On the L3301, if the "Engine Warning" light (an amber engine outline) comes on, the LCD display will usually overwrite the hour meter with a code starting with "P" followed by four numbers. These are the specific computer codes telling us what sensor failed.

Here are the most common ones I see on the L3301:

Code	System	What it Means	Mechanic's Note
P3001	DPF System	Soot Accumulation High. The tractor is choked up. It needs a regeneration cycle immediately.	You likely ignored the regen light too long. You need to perform a parked regeneration now.
P3002	DPF System	DPF Differential Pressure. The pressure difference before and after the filter is abnormal.	Usually means the DPF is clogged beyond what a normal burn can fix, or the sensor lines are blocked.
P3008	Engine	Camshaft Position Sensor. The computer can't tell where the engine is in its rotation.	The tractor may not start or will run very roughly. Check the wiring to the sensor on the engine block.
P0087	Fuel	Fuel Rail Pressure Low. The engine isn't getting enough fuel pressure.	#1 Common Issue. usually a clogged fuel filter or water in the fuel. Change your fuel filters first!
P0563	Electrical	Battery Voltage High. The system is seeing more than 16V.	Often happens if you jump-start the tractor incorrectly or if the alternator regulator fails.
P0562	Electrical	Battery Voltage Low. The system is seeing less than 10V.	Check your battery terminals and alternator belt tension.
P2293	Fuel	Fuel Pressure Regulator. The valve that controls fuel pressure is acting up.	Can cause stalling or lack of power.

 

[JeepHead]

2. The "Red" Lights (Critical - STOP NOW)​

If you see these, you risk catastrophic damage. Shut the tractor down immediately.

• Oil Pressure (Oil Can Icon): Your engine has lost oil pressure. If you run the tractor for even 30 seconds with this on, you can seize the engine.
  • Check: Oil level on the dipstick.
• Coolant Temperature (Thermometer in Liquid): The engine is overheating.
  
  
  • Check: Radiator screen (often clogged with grass/dust) or low coolant level. Do not open the radiator cap while hot.
• Battery Charge (Battery Icon): The alternator is not charging the battery.
  
  
  • Check: The fan belt. If the belt breaks, the alternator stops spinning AND the water pump stops spinning, leading to overheating.

---

3. The DPF (Diesel Particulate Filter) Lights​

This is the most confusing part for new L3301 owners. The tractor has a "filter" in the muffler that traps soot. It must burn this soot off periodically (Regeneration).

• Regen Indicator (Rectangle with puff of smoke - Solid): The tractor wants to regenerate.
  • Action: Keep working. Increase RPMs to over 2200. The heat from working hard will clean the filter.
    
    
• Regen Indicator (Flashing): You didn't work it hard enough, and now it needs to burn.
  • Action: It's best to stop and perform a Parked Regen, or run the tractor very hard immediately.
• Parked Regen (P-Icon with smoke): The tractor has entered "Limp Mode" or is demanding you park it to clean the filter.
  • Action: Park the tractor, set the brake, put it in neutral, and press the "Regen" button (left side of dash) until the RPMs spike. Let it sit for 20-30 mins until it finishes.

Mechanic's Tip for the L3301​

If you see a code like P0087 (Low Fuel Pressure), do not immediately buy a fuel pump. On the L3301, this is almost always the fuel filter. There is a small O-ring on the fuel filter bowl that, if pinched during a filter change, will suck air and throw this code. Always start with the cheap fixes first.

 

[JeepHead]

1. Fuel System Codes (Most Common)​

These are the most frequent codes we see in the shop. The Common Rail system relies on extremely high pressure, so even a small air bubble or dirty filter will trigger these.

Code Component What It Means Mechanic's Insight P0087 Fuel Rail Pressure System Pressure Too Low. The engine is starving for fuel. #1 Common Fault. 90% of the time, this is a clogged fuel filter or water separator. Change both filters first. P0088 Fuel Rail Pressure System Pressure Too High. The pressure is spiking beyond safe limits. Usually a stuck Fuel Pressure Regulator (SCV) on the high-pressure pump. P0089 Suction Control Valve SCV Stuck. The valve controlling fuel flow into the pump is stuck. Can be caused by bad/dirty diesel. Try a fuel additive (like Power Service) before replacing the pump. P0093 Fuel System Fuel Leak Detected. The computer senses a massive loss of pressure. Look for visible diesel leaking on the engine. If none, it's likely an injector returning too much fuel internally. P0192 Rail Pressure Sensor Sensor Voltage Low. Short to ground or open circuit. Check the wiring harness leading to the fuel rail sensor; mice love to chew these wires. P0193 Rail Pressure Sensor Sensor Voltage High. Short to power. Wiring issue or failed sensor. 2. DPF & Emissions Codes (Critical) The L3301 has a Diesel Particulate Filter (DPF) muffler. These codes are related to soot buildup and regeneration. Code Component What It Means Mechanic's Insight P3001 DPF System Soot Accumulation High. The filter is choked. You likely ignored the "Regen" light. You must perform a Parked Regeneration immediately. P3002 DPF Differential Pressure Difference High. The sensor sees too much backpressure. The DPF is clogged or the small rubber hoses going to the sensor are melted/blocked. P3004 EGR System EGR Valve Malfunction. The valve is stuck open or closed. Can cause the engine to smoke or lose power. The valve may need cleaning or replacement. P2463 DPF System Diesel Particulate Filter Restriction. Similar to P3001 but often indicates the soot load is critically high. P2452 DPF Pressure Sensor Pressure Sensor Circuit Malfunction. The sensor that tells the computer how dirty the filter is has failed or is unplugged. 3. Engine Sensor Codes These codes tell you which specific sensor on the engine block is failing. Code Component What It Means Mechanic's Insight P3008 Camshaft Sensor Cam Position Signal No Pulse. The computer doesn't know when to fire the injectors. Engine will crank but not start, or run very rough. P0335 Crankshaft Sensor Crank Position Circuit Malfunction. Similar to the cam sensor (P3008). Check the sensor reading the flywheel speed (RPM). P0117 Coolant Sensor Coolant Temp Circuit Low. (Reads extremely hot) The tractor thinks it is overheating instantly. Usually a shorted wire. P0118 Coolant Sensor Coolant Temp Circuit High. (Reads extremely cold) The tractor thinks it's -40°F. Usually a broken wire or unplugged sensor. P0107 MAP Sensor Manifold Air Pressure Low. Turbo or intake issue. Check for a loose hose clamp on the intake piping between the air filter and engine. P0221 Throttle Pedal Accelerator Sensor Position Mismatch. The foot pedal and hand throttle disagree. Try moving the hand throttle back and forth to reset. 4. Electrical System Codes Issues with the battery, alternator, or ECU itself. Code Component What It Means Mechanic's Insight P0562 System Voltage Battery Voltage Low (<11.5V). Check your battery terminals and alternator belt. P0563 System Voltage Battery Voltage High (>16V). STOP immediately. Your alternator regulator has failed and is frying the electronics. Do not run the tractor. P0605 ECU Memory ROM Error. The main computer (ECU) has an internal memory fault. Usually requires ECU replacement. P0606 ECU Processor CPU Fault. Similar to P0605. The "brain" of the tractor is failing. How to Read the Codes properly On the L3301, the codes don't always stay on the screen. Warning Light: An amber "Engine!" symbol will appear on the dash. Display: Look at the digital screen. It may cycle between the hour meter and the code (e.g., P0087). Multiple Codes: If there are multiple faults, it will scroll through them.

 

[JeepHead]

This comes from AI and cover the 3301, 3901, and 4701. So double check it.

 

[RjCorazza]

If you go to KubotaBooks.com they have the WSM that covers the various codes. Beginning at Section 9 -S4

 

[M59]

KubotaBooks.com can be helpful. IGNORE the crap that keeps sliding in from the left side of the screen and go to the bottom of the page and click on one of pictures appropriate to what you want. The L hand slider must be click bait or pay per click the web site is using to generate income.