What is Engine Torque Limitation?

[DeFrank]

Here are the reasons for engine torque limitation in vehicles:1. High and low fuel circuit issues: Blockage in the low-pressure fuel circuit, insufficient fuel intake, or compression of the return fuel line can cause engine torque limitation. Similarly, high-pressure fuel circuit leaks, flow metering unit malfunctions, or high-pressure fuel pump damage can also lead to engine torque limitation.2. Sensor issues: The ECU has an overheating protection function. When the water temperature, oil temperature, or intake air temperature is too high, the protection function will activate, limiting engine power and causing engine torque limitation. Additionally, damage to the water temperature sensor or oil pressure temperature sensor can also result in engine torque limitation.3. Data management problems: Due to existing issues in data management, which may still have some imperfections, there are rare cases where incorrect data may be flashed. This could cause internal control logic errors in the ECU, leading to engine torque limitation.4. Urea nozzle blockage: If the urea nozzle is blocked, it will lose its spray effect. When the ECU computer control system detects such an anomaly, it will limit the engine's torque.5. Use of low-quality diesel: If the engine uses low-quality diesel, excessive sulfur dioxide may enter the catalyst. Once the catalyst fails, the engine's power output will be limited due to excessive exhaust emissions.