What Causes the Engine Fault Light to Illuminate After Wading Through Water?
1 Answers
If the engine fault light illuminates after wading through water, it indicates an issue with the vehicle's engine. This is usually caused by the engine belt slipping due to water ingress, and the problem can typically be resolved by thoroughly drying the water from the engine belt. Reasons for the engine fault light to illuminate include: 1. Fuel quality issues: Poor or substandard fuel quality. If the engine fault light comes on immediately after refueling, it is often due to filling up with low-quality fuel at an unregulated gas station. While this situation does not affect the vehicle's operation, it can cause damage to the engine. 2. Damaged water temperature sensor: When the engine is cold, the water temperature sensor sends information to the ECU to enrich the air-fuel mixture, ensuring stable engine operation. If the sensor fails to indicate the cold engine state, the air-fuel mixture will become too lean, leading to unstable engine performance. Conversely, if the sensor sends a cold engine signal when the engine is warm, the air-fuel mixture will become too rich, also causing abnormal engine operation. 3. Carbon buildup in the engine and spark plugs: Over time, carbon deposits accumulate in the engine, leading to engine damage, difficulty starting, poor acceleration, excessive engine noise, and other issues. The accumulated heat can cause erratic ignition, resulting in engine knocking. In such cases, the engine fault light will illuminate.
