Where are the O2 sensors on a Silverado?
There are two types of O2 sensors on your vehicle: upstream and downstream sensors. They essentially serve the same purpose, but are located in the different parts of your Silverado. The downstream oxygen sensor is located behind your catalytic converter.
What happens if your O2 sensor goes bad?
Oxygen sensors play a vital role in both engine management and emissions control. When an O2 (oxygen) sensor go bad, it’ll cause your Chevy Silverado ‘s engine to run less efficiently.
Why do I need two sensors on my Silverado?
A dual exhaust system will require two downstream sensors and many larger engines often feature multiple upstream manifold sensors. A rich mixture will indicate there is too much fuel being added. This will cause the ECU to cut back on fuel, impacting your Silverado’s power.
Where is the oxygen sensor in the engine?
An Oxygen sensor that is between the catalytic converter and the engine is known as an “upstream” sensor. Oxygen sensors after the catalytic converter are “downstream sensors”. As a rule, the upstream sensor is more important for engine timing and air/fuel ratios.
How do you install a new O2 sensor?
Hand-tighten the new O2 sensor into place. Use the 7/8″ Crescent wrench to tighten the O2 sensor to a snug fit. Reconnect the wire harness to the new O2 sensor. Route the wire harness to the frame rail. Push the wire harness clip back into place.
Why do I need an O2 sensor on my car?
Maybe the two simplest ways to improve an old vehicle’s performance is with a new air filter and oxygen sensor. Most vehicles today are outfitted with at least two O2 sensors, an upstream and downstream sensor and one for each exhaust manifold, that help maintain vehicle emissions and fuel economy.
What are the symptoms of an oxygen sensor going bad?
One of the most common symptoms that an oxygen sensor has gone bad is exhaust that does not smell good. The smell is often described as “rotten eggs” or sulfuric. Either way, like with rotten food, “the nose knows”.
What causes an error code on the O2 sensor?
Even if the error code is caused by the O2 sensor, be aware that most of the time it’s not the sensor itself that’s malfunctioning, but it is catching problems caused by other parts of the engine. Before you replace the O2 sensor, you should inspect your vehicle for any air leaks or loose gaskets as those could also cause an error.