But an o2 sensor code will surely show up in a diagnostic test.
Check engine light on jeep wrangler but no code.
Try as we may to keep our jeep vehicles running in perfect condition odds are the vehicle will throw a code and light up the check engine symbol at some point along the way.
When retrieving jeep check engine light codes with an obd ii scan tool proceed as follows.
Put the key in the ignition and turn it to the on position for about five seconds.
Replace the positive clamp to the positive battery terminal and tighten the bolt with the wrench.
Turn the engine on.
Step 2 replace faulty component s after gathering the stored fault code s and properly diagnosing the source of the problem proceed with replacing the faulty component s.
And the tricky thing with the o2 sensor is that the car will continue to drive well so you might want to dismiss the light.
One main reason that a check engine light comes on with no code being stored is that there is a software error.
For jk wranglers checking the engine code is a relatively simple task.
How to check an engine code.
Connect scan tool to the 16 pin data link connector dlc located near the steering column.
While it is nifty that jeep has included a built in code reader it cannot be used to manually reset the check engine light.
Insert key into the ignition.
The connector may have a removable cover.
Most frequently the software errors stem from a low level obd reader being used.
Just complete the following steps.
This is often the result of something being wrong with the obd reader that the driver parts store or mechanic shop is using.
Basically what this means is your jeep s computer has detected some sort of problem with a part or system on the vehicle and is letting you know via the malfunction indicator light check engine light.
Turn to on position without starting the jeep.
A failing oxygen sensor also known as an o2 sensor is one of the most common reasons for that jeep check engine light to come on.
Push the key in and turn it to off and then to on three times leaving it in the on position.
