Engine code P0171 means that an oxygen sensor in a vehicle’s engine has detected too much oxygen in the exhaust. It is often caused by intake air leaks, faulty fuel injectors and exhaust gas leaks.
Code P0171 is one of the more common trouble codes. An internal oxygen sensor triggers this code when it senses too much air in the system. The sensor provides a reading of the air/fuel ratio leaving the engine's cylinders.The vehicle's powertrain/engine control module uses that reading and adjusts to keep the engine running at that optimum ratio. If the ratio cannot be maintained and there is too much air, it triggers this code.Learn More
Small amounts of water will likely burn off as the engine heats, but larger amounts of water will change the car engine oil's consistency, potentially causing serious operational problems with the car. Water should never be added to automotive engine oil deliberately, and typically the two substances only mix through condensation, which is normal and unlikely to cause problems. However, water can also enter a car's engine oil through broken gaskets within the car's cooling system, which would need to be evaluated by a qualified mechanic for repairs.Full Answer >
When an engine knocks, one of the likely causes is low-quality fuel. Fuel of low quality or a low octane rating results in many different problems in the engine. This fuel rating informs the consumer of the amount of compression gasoline is able to tolerate. According to HowStuffWorks, these problems are why high-performance engines require higher-octane fuel to prevent knocks.Full Answer >
An engine control module is a device that monitors a network of sensors in a car and performs necessary adjustments to the conditions when they are outside of the normal operating range. The module stores a code whenever it encounters a problem, allowing a mechanic to scan it later.Full Answer >
It is recommended that engine coolant be changed seasonally. In order to work properly, an engine's cooling system and radiator need to be clean. After time, deposits build up and can clog the radiator. Changing engine coolant seasonally helps keep the cooling system clean.Full Answer >