What are the causes of Citroen C6 engine failure?

[LeAshlyn]

Citroen C6 engine failure may be caused by the following specific reasons: 1. Poor fuel quality: Low-quality gasoline can lead to incomplete combustion of the air-fuel mixture in the cylinder, excessive carbon deposits, potential clogging of fuel lines and corrosion of components, while also affecting the normal concentration of the air-fuel mixture, ultimately resulting in engine failure accompanied by shaking vibrations. 2. Damaged oxygen sensor: A faulty oxygen sensor or loose/damaged sensor connector can cause the air-fuel mixture to become too lean or too rich, leading to engine failure. If there's an issue with the mass airflow sensor or its circuit, the engine control unit won't receive accurate intake air volume signals, preventing proper fuel quantity adjustment, which may cause the mixture to be too lean or too rich, making the engine unable to operate normally. Sometimes this is accompanied by illumination of the engine warning light. 3. Spark plug carbon deposits: This can cause poor engine performance, manifesting as difficult starting, unstable idle, poor acceleration, backfiring during rapid acceleration, excessive exhaust emissions, increased fuel consumption and other abnormal symptoms.