Audi A3 Quattro overheating issue indicated by coolant level sensor circuit code on Audi A3 Quattro

Some Audi A3 Quattro owners report experiencing overheating issues related to a faulty coolant level sensor, which can lead to incorrect coolant level readings and potentially cause the engine to overheat. Symptoms of this malfunction may include inaccurate temperature gauge readings, frequent engine overheating, a lit check engine light, poor fuel economy, and erratic engine performance. Additionally, a malfunctioning coolant temperature sensor can provide incorrect readings to the engine control unit (ECU), resulting in warning lights and decreased engine performance. Owners may also encounter the P0118 diagnostic trouble code, indicating that the coolant temperature sensor circuit is registering abnormal voltage, often due to sensor damage or wear. Repair costs for addressing this issue can vary, with parts typically ranging from $50 to $150 and labor costs between $100 and $200. It is crucial for owners to have the coolant level sensor checked and repaired by a qualified mechanic to prevent further damage and ensure optimal vehicle performance.