![]() ![]() There could also potentially be raw fuel that enters the exhaust. Without being able to optimize the air fuel ratio, combustion isn’t as efficient, and fuel mileage suffers. ![]() A bad oxygen sensor can affect the mixture greatly. The engine management computer uses the data from all of the O2 sensors to keep the air/fuel mixture optimized. Your Silverado’s oxygen sensors are responsible for helping to keep your engine running at optimal efficiency. As a rule, the upstream sensor is more important for engine timing and air/fuel ratios.īy using a OBDII scanner you can determine exactly which sensor is bad, and what is wrong with it. Oxygen sensors after the catalytic converter are “downstream sensors”. An Oxygen sensor that is between the catalytic converter and the engine is known as an “upstream” sensor. Sensor 1- Sensor 1 would be the first O2 sensor in the line of sensors starting with the exhaust manifold and making its way back to the exhaust pipe.This means that you need to look up the firing order for your particular model year and engine. Bank 1- Side of the engine with the first cylinder in the firing order.For instance, an oxygen sensor at bank 1 – sensor 1 would be: These codes correspond with what side of the engine they are on (known as the “bank” for cylinder bank) and how far down stream they are. There are many oxygen sensor related codes. More often than not, when an oxygen sensor in your Silverado goes bad, it will throw a diagnostic trouble code. Here are the most common symptoms of a bad oxygen sensor in your Silverado: It is very rare for there to be a problem with an oxygen sensor, and not have the check engine light come on. The trouble codes associated with the OBDII scan will reveal which sensor is at fault and why it is bad (at least what the computer thinks is wrong). It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test. Most of the time, the check engine light will come on. Oxygen sensors can change the way that your Silverado’s engine runs. The good news is, if you end up discovering that the oxygen sensor is bad, they really aren’t that expensive to replace.īad Oxygen Sensor Symptoms: Chevy Silverado Often enough, the only sign of the problem at all is the service engine soon light being on. Your Silverado can exhibit symptoms when the Oxygen sensor has gone bad. When an O2 (oxygen) sensor go bad, it’ll cause your Chevy Silverado‘s engine to run less efficiently. Oxygen sensors play a vital role in both engine management and emissions control. ![]()
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