Check Engine Light On Jeep Wrangler But No Code

The engine warning light will flash and then turn off.

Check engine light on jeep wrangler but no code.

For jk wranglers checking the engine code is a relatively simple task. Most frequently the software errors stem from a low level obd reader being used. 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. 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.

Replace the positive clamp to the positive battery terminal and tighten the bolt with the wrench. Push the key in and turn it to off and then to on three times leaving it in the on position. Insert key into the ignition. Put the key in the ignition and turn it to the on position for about five seconds.

Turning the key 3x tells the obd on board diagnostics computer there has been 3 bad runs with the same error and it throws out a code on the instrument panel. When retrieving jeep check engine light codes with an obd ii scan tool proceed as follows. Just complete the following steps. Turn to on position without starting the jeep.

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. Turn the engine on. 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.

If you drive a jeep wrangler jk you can check engine fault codes by inserting the key into the ignition and turning it 3x to the run position without starting the vehicle. While it is nifty that jeep has included a built in code reader it cannot be used to manually reset the check engine light. Connect scan tool to the 16 pin data link connector dlc located near the steering column. The connector may have a removable cover.

But an o2 sensor code will surely show up in a diagnostic test.