Error code database

Engine ECU — Internal Fault Detected

The engine ECU has logged an internal fault. The tractor may exhibit erratic power delivery, unexpected shutdowns, or warning lights with no other obvious cause.

Fuel System — Low Rail Pressure

The common rail fuel injection system is not reaching the required injection pressure. Engine may run rough, lack power, or produce excessive smoke.

Hydraulic System — Charge Pressure Low

Hydraulic charge pressure is below the required operating level. Three-point linkage and remote valves may be sluggish or non-responsive.

Electronic Brake Control — Hydraulic Pressure Fault

The electronic brake control system has detected a hydraulic pressure fault. Brake response may be reduced — operate with caution.

Dyna-VT / DynaShift Transmission — Gear Engagement Fault

The transmission control system has detected a fault with gear or range engagement. The tractor may be stuck in a gear or refuse to select certain ratios.

SCR After-Treatment — DEF/AdBlue System Fault

The selective catalytic reduction (SCR) system has detected a fault. If not resolved, the engine will derate to 60% power after a warning period.

Powershift Transmission — Pressure Regulator Fault

The transmission pressure regulator is not maintaining the correct clutch pack pressure. Gear engagement may be harsh or incomplete.

Fuel Delivery Pressure — Below Minimum

Fuel delivery pressure to the injection system is below the minimum required. Engine may run rough or refuse to start under load.

Hydraulic Oil Temperature — Over Limit

Hydraulic oil temperature has exceeded the safe operating limit. Continued operation risks seals, pump, and valve damage.

Engine Coolant Temperature — Sensor Fault

The engine control module is detecting a fault in the coolant temperature sensor circuit. Engine may derate to protect itself.

Engine Speed Sensor (or Cam Sensor) Failed

The engine speed sensor (8.3/9L engines) or cam sensor (15L engines) has failed or is not providing a signal. Without knowing engine speed, the ECU cannot control fuel injection. The engine may crank but not start, run rough and shut down, or not crank at all.

Sensor Supply 2 Voltage Too Low

The internal 5-volt reference supply that powers multiple sensors has dropped below the minimum threshold. Every sensor on this supply reports incorrect values, triggering a cascade of secondary fault codes. This is one of the most frequent causes of stored faults on modern Case IH tractors.

DEF/SCR System Fault — Water in Fuel / SCR Efficiency

ENG 418 indicates water in the fuel filter that needs draining. ENG 3146 indicates SCR system efficiency faults. These codes frequently co-occur due to water contamination in fuel or DEF fluid. These are the codes that make farmers curse Tier 4 emissions equipment.

Hitch Rockshaft Position Potentiometer Failure

The Electronic Draft Control (EDC) position sensor on the hitch rockshaft is misadjusted, worn, or contaminated. The hitch may not raise/lower correctly or may not respond to commands at all.

No Signal from Wheel Speed Sensor

The transmission controller is not receiving any signal from the wheel speed sensor. Without wheel speed data, the transmission cannot function correctly and will refuse to engage gears or move.

Transmission Charge Pressure — Low

Transmission charge pressure is below the required level. The transmission may slip, shift poorly, or refuse to engage.

Fuel Rail Pressure — Low

Fuel pressure in the common rail system is below the expected value. The engine may run rough, derate, or fail to start.

Throttle Position Sensor Signal Out of Range High

The foot throttle sensor is sending a voltage signal that exceeds the maximum expected range. The ECU will default to a limited RPM mode or refuse to respond to throttle input.

Low-Pressure Fuel Supply — Pressure Moderately High

The fuel pressure in the low-pressure supply circuit is reading higher than the expected range. This can indicate a restriction in the fuel return line, a faulty fuel pressure regulator, or a sensor issue. The ECU will derate power to protect the fuel injection system.

Engine Oil Pressure Extremely Low

The ECU is detecting that engine oil pressure has fallen below the minimum safe operating threshold. Running with low oil pressure will destroy bearings, score cylinder walls, and potentially seize the engine within minutes.

Air Filter Restricted

The ECU has detected that the air filter restriction switch is closed, or the air filter pressure differential sensor is reading extremely high. Your air filter is clogged and the engine can't breathe properly.

Engine Coolant Temperature Extremely High

The ECU is detecting that engine coolant temperature has exceeded 115°C / 240°F. This is the most severe level of coolant temperature warning. The ECU will actively derate engine power to protect the engine.

Coolant Level Low at High Coolant Temperature

The coolant level switch has triggered at the same time as elevated coolant temperature. You're low on coolant while the engine is already hot. This combination dramatically increases the risk of engine damage.

Fuel Temperature Above Normal Range

The fuel temperature sensor is reading above the acceptable range (typically above 65°C/149°F). Hot fuel loses viscosity and lubrication properties, which can damage the high-pressure fuel injection pump. The ECU derates power and disables power boost to protect the injection system.

Engine Overspeed Extreme

The ECU has detected that engine RPM has exceeded the maximum safe limit (typically above 2,800 RPM). The ECU will immediately cut fuel delivery to bring engine speed back under control. Most commonly caused by driving downhill with a heavy load.

EGR Temperature High — Engine Power Limited

The Exhaust Gas Recirculation system temperature is above specification. The ECU limits power to protect the engine and emissions system. This is one of the most common and most frustrating codes on Tier 4 Final engines.

CAN Bus Communication Fault — Abnormal Update Rate

The CAN (Controller Area Network) bus is the digital nervous system connecting all electronic modules on your tractor. SPN 639 FMI 9 means one or more modules aren't communicating at the expected rate. This can affect engine, transmission, display, and hydraulic operations.

ECU — Loss of Communication with Engine Control Module

The main controller has lost communication with the engine ECU on the CAN bus. The tractor may derate or shut down as a safety measure.

Engine Oil Pressure — Below Minimum Threshold

Engine oil pressure has dropped below the minimum safe operating threshold. Stop the engine immediately — continuing to run risks serious engine damage.

Hydraulic Oil Filter — Restriction Detected

The hydraulic system filter bypass sensor has detected a restriction. The filter is likely clogged and should be replaced before hydraulic damage occurs.

Engine Coolant Temperature Sensor — Signal Out of Range

The ECU is receiving a coolant temperature reading outside the expected range. Most likely a failed sensor.

Engine Coolant Temperature Sensor — Short to Ground

The coolant temperature sensor circuit is shorted to ground. Usually a wiring issue rather than the sensor itself.

Engine Coolant Temperature Sensor — Open Circuit

The ECU cannot detect the coolant temperature sensor signal — the circuit is open. Usually a disconnected plug or broken wire.

DEF Level Sensor — Signal Out of Range

The diesel exhaust fluid (DEF) level sensor is reading outside its expected range. The SCR after-treatment system may be affected.

Hydraulic System Pressure — Below Minimum Operating Pressure

Hydraulic system pressure has dropped below the minimum threshold. Loader, three-point hitch, and remote hydraulics may not function correctly.

Battery / Charging System Voltage Fault

The instrument panel controller has detected battery/charging voltage outside the expected range (below 11V or above 16V). This is critically important on MF 7700 and 8700 series tractors because a voltage problem can cascade secondary fault codes across engine, transmission, and hydraulic controllers.

Engine Oil Pressure Extremely Low

The AGCO Power engine ECU has detected oil pressure below the minimum safe operating threshold. Functionally identical to John Deere ECU 000100.01. Running with low oil pressure will destroy the engine.

Engine Coolant Temperature Extremely High

The AGCO Power engine ECU has detected coolant temperature above the maximum safe threshold. Functionally identical to John Deere ECU 000110.00. Engine power is derated to protect the engine.

Engine Fault — AdBlue/DEF Technology (SCR System Fault)

The general SCR system fault on Massey Ferguson tractors with AdBlue/DEF emissions equipment. Emergency operation: engine power limited to approximately 60% of normal, maximum speed capped at 1,500 RPM. This is the single most discussed and most hated code among UK and European MF operators.

Transmission Wheel Speed Sensor Fault

The transmission controller is not receiving a signal from the wheel speed sensor. The Dyna-VT or Dyna-6 transmission cannot function correctly without speed data and will enter protective mode, refusing to move.