2011-liberty jet code = po139 - Jeep Garage - Jeep Forum

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  #1  
Old 01-28-2015, 08:44 PM
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2011-liberty jet code = po139

THATS MY CODE PO139 SAYS SLOW RESPONCE. I CHANGED ALL 4 SENSORS
.gas cap ,cleaned Intake,20" vacuum ,seafoam in gas tank , no leaks in intake or exhaust ,.CLEARED CODE AND COMES BACK EVERYTIME..MOSTLY EVERYTIME I TAKE MY FOOT OFF GAS FAST WHEN IM GOING 30-70 MPH
...ANY SUGGESTIONS ????????

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Old 03-22-2015, 11:15 AM
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Re: 2011-liberty jet code = po139

This can have to do with an intake or exhaust leak. Also check the wiring for chaving or eventually melted insulation from contact with a hot exhaust part.
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Old 03-22-2015, 11:56 AM
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Re: 2011-liberty jet code = po139

EVERYTHING WAS CHECKED.....I JUST CHECKED THE OLD SENSORS LAST NIGHT..THREE ARE OE.., BUT THE REAR DRIVERS SIDE WAS A RUSSIAN MADE ONE FOR A FORD..!!!!!...I BOUGHT THIS (NEW) AT A DEALERSHIP IN FLORIDA IN LATE 2011 ... HAD 150 MILES ON IT...... NO WORK WAS DONE ON IT SENCE BY ANYBODY BUT ME .EXCEPT OIL CHANGES...... NOW IM WOUNDERING IF DEALER HAD A PROBLEM PRYER TO SALE OR OIL CHANGER MADE A SWAP !!!!!!!!!!!!!!!
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Old 03-22-2015, 09:32 PM
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Re: 2011-liberty jet code = po139

But is the P0139 code now gone?
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Old 03-23-2015, 10:34 AM
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Re: 2011-liberty jet code = po139

IT STILL COMES ON WHEN I TAKE MY FOOT OFF GAS FAST..I COULD RIDE ON HIGHWAY FOR HOURS,AS LONG AS I SLOW DOWN SLOWLY . AROUND TOWN GOING 45 & STOPPING FASH AT LIGHT. IT COULD BE 5 MILES TO 50 MILES DRIVING..I NEED A OIL CHANGE,SO ILL TAKE IT TO DEALER & SEE WHAT THAY SAY..I HAD PUT IN TWO WALKER SENSORS = ON AFTER CONVERTERS.FIRST ..THEN FEW WEEKS LATER ADDED TWO BOSCH SENSORS ON FRONT OF CONVERTERS.THEN SWAPPED SIDES....STILL ON !!!
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Old 03-23-2015, 04:52 PM
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Re: 2011-liberty jet code = po139

Im not sure which sensors the liberty uses as OEM, but there are many cases known from Bosch sensors to cause problems on jeeps.
Also when there are for sure no leaks in the exhaust close to the aft sensor, then there is a change that the problem is the catalytic converter itself.
It would be interresting to see on a scanner with live data, what the O2 sensor output does when you take your foot of the gas suddenly.
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