How many O2 sensors does a Jeep JK have?
There are 2 O2 sensors, 1 in the exhaust beside the oil pan (well ahead of the cat) and 1 at the rear of the cat toward the rear driveshaft.
What happens when the oxygen sensor goes bad in a Jeep Cherokee?
More often than not, when an oxygen sensor in your Cherokee goes bad, it will throw a diagnostic trouble code. There are many oxygen sensor related codes. 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.
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.
Why does the Check Engine light come on on my Jeep Cherokee?
Oxygen sensors can change the way that your Cherokee’s engine runs. Most of the time, the check engine light will come on. 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.
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 happens when the O2 sensor goes bad on a Jeep Grand Cherokee?
When an O2 (oxygen) sensor go bad, it’ll cause your Jeep Grand Cherokee ‘s engine to run less efficiently. Your Grand Cherokee can exhibit symptoms when the Oxygen sensor has gone bad. Or, it may exhibit none at all. Often enough, the only sign of the problem at all is the service engine soon light being on.
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.
Can a bad oxygen sensor cause a check engine light to 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 is very rare for there to be a problem with an oxygen sensor, and not have the check engine light come on. Here are the most common symptoms of a bad oxygen sensor in your Grand Cherokee:
Oxygen sensors can change the way that your Cherokee’s engine runs. Most of the time, the check engine light will come on. 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.