What Causes the Fault Light to Illuminate in a China V Diesel Engine?

[LaIsla]

Damage to the intake pressure temperature sensor. Temperature sensor damage: Cause analysis: Abnormal intake pressure signal prevents the ECU from receiving correct intake volume information, leading to abnormal fuel injection quantity. This results in incomplete combustion, reduced engine power, and black smoke emission during acceleration. Both wiring harness connection issues and sensor failure can cause this fault. Coolant temperature sensor damage: Cause analysis: When the coolant temperature sensor fails, the ECU detects unreliable output signals and uses substitute values. To protect the engine, the ECU limits engine torque. Engine oil pressure sensor damage: Cause analysis: Severe damage to the engine oil pressure sensor probe leads the ECU to detect no connection with the sensor, and the displayed value on the instrument panel is a substitute value from the ECU.