![]() ![]() If the fuel mixture becomes excessively rich to the point where the fuel cannot be adequately burned in the combustion chamber, it will burn up in the exhaust pipes and cause black smoke. If the coolant temperature sensor fails and sends a cold signal to the computer, this can confuse the computer and cause it to unnecessarily enrich the fuel mixture. Black smoke from engineĪnother symptom of a possible problem with the coolant temperature sensor is black smoke from the vehicle’s exhaust. This will reduce fuel economy, and may hinder engine performance. This will cause the computer to think the engine is cold, even when it is not, and as a result will use more fuel than necessary. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. Usually a problem with the coolant temperature sensor will cause a few symptoms that alert the driver of a potential problem that should be thoroughly inspected. The computer will also scale back engine performance settings if it detects that the engine temperature is too high, in order to protect the engine from possible damage due to overheating.īecause temperature plays such a vital role in engine performance calculations, any problem with the coolant temperature sensor can quickly translate into an engine performance issues. This signal is then sent to the computer so that changes can be made to the engine’s timing and fuel calculations for optimal performance, as engines require more fuel when they are cold, and less fuel when they are fully warmed up. ![]() Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant. The coolant temperature sensor, also known as the coolant temperature switch, is an engine management system sensor that is used to monitor the temperature of the engine’s coolant. ![]()
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