The typical signs of a faulty oxygen sensor include increased exhaust emissions due to poor air fuel mixture, engine hesitations, engine misfires, stalling, rough idling and increased fuel consumption. The oxygen sensor is a crucial component of a vehicle's electronic fuel injection and emission system, and it relays information to an on-board engine management computer that regulates fuel delivery to the engine.Know More
Oxygen sensors are normally screwed into the exhaust manifold and detect unburned combustibles in the exhaust flow using ceramic elements and send readings to a computer via electric wires and relays. The computer then analyzes the readings to ensure the correct ratio of air fuel mixture for optimal fuel economy.
A modern oxygen sensor's life span is typically 100,000 miles, but carbon buildup on probes often causes premature failures, according to Popular Mechanics. Contaminated fuel, leaded gasoline and gasoline with high silicone content can corrode sensor probes that lead to malfunction. Malfunctioning oxygen sensors relay inaccurate air fuel mixture readings to the engine management computer.
Most modern vehicles come equipped with a "Check Engine" light activated by the engine management computer to warn drivers that the vehicle's oxygen sensors are failing. This warning light is located along other warning lights on the dashboard.Learn more about Car Parts & Maintenance
A faulty camshaft sensor results in numerous problems with a car, including an illuminated check engine light, a poorly running engine and difficulty or failure to start. The camshaft sensor replaces the distributor in many modern cars, and if it malfunctions, the spark plugs fail to fire correctly. According to O'Reilly Auto Parts, faulty camshaft sensors are the 11th most common automotive repair.Full Answer >
According to Repairpal.com, symptoms of a bad knock sensor include poor acceleration, knocking noises during acceleration, poor fuel mileage and a visible check engine light. The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. Autopartswarehouse.com explains that the knock sensor has a direct effect on the engine’s ignition timing. A bad knock sensor causes a decrease in acceleration and fuel mileage.Full Answer >
A faulty oxygen sensor can cause several problems in a car including a poor fuel economy, failure of the catalytic converter and an overall bad engine performance. Having a bad oxygen sensor can also send the the "Check Engine" light to go on or in more recent car model, send an O2 sensor code to the car's computer.Full Answer >
The symptoms of a bad oxygen sensor or O2 sensor include mileage decrease, trouble code display on on-board diagnostic system and a smog test failure. Among other factors, an illumination of the car's malfunction indicator lamp can be a sign of a faulty oxygen sensor.Full Answer >