My 10 sahara engine light came on, just had oil change, I have 75, 219 miles , runs fine, . This an automated thing ?

 

Run the computer to see what code it is throwing

 

How do I do that ??

 

https://www.jk-forum.com/forums/jk-w...ey-mean-22539/

 

It displayed po455

 

P0455-EVAP PURGE SYSTEM LARGE LEAK


When Monitored:
With the engine running, during a cold start test with the fuel level above 12%, ambient temperature between 4° C and 32° C (39° F and 89° F) and the fuel system in closed loop. The test runs when the small leak test is maturing.

Set Condition:
The PCM activates the EVAP Purge Solenoid to pull the EVAP system into a vacuum to close the ESM switch. Once the ESM switch is closed, the PCM turns the EVAP Purge solenoid off to seal the EVAP system. If the ESM switch reopens before the calibrated amount of time, a large leak error is detected. Two Trip Fault. Three good trips to turn off the MIL.


Possible Causes

EVAP PURGE SYSTEM LEAK

EVAP PURGE SOLENOID

EVAP SYSTEM MONITOR SWITCH

 

ok what should i do know ? how do i get light off,is it a gas cap thing? do i need dealer ?

 

First I would try re-seating the gas cap and see if the code clears.

If you feel like getting under it, then start at the canister at the back on the left side just in front of your Diff.
Follow those lines to the front looking for cracks or breaks. They will end up by your Batt at the EVAP control soleniod.
From there they run to the intake manifold.

If not...take it to your dealer.

 

Re seated cap, after three rides it went away

 

Glad it was a simple fix.