The only Service Bulletin involving cruise control I could find was this one:
SERVICE BULLETIN NUMBER: 18-024-11
GROUP: Vehicle Performance
DATE: May 14, 2011
SUBJECT:
Flash: MIL Illumination And Cruise Switch Inoperative And Idle Buffeting Condition
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
MODELS:
2008 - 2011 (JK) Wrangler
NOTE: This bulletin applies to vehicles equipped with a 3.8L engine (sales code
EGT) built before March 27, 2011 (MDH 0327XX).
SYMPTOM/CONDITION:
The customer may experience a MIL illumination when no problem exists. Upon further
investigation the Technician may find any of the following Diagnostic Trouble Codes (DTC)
active or stored:
a. P2181 - Cooling System Performance (2008 through 2011 models)
b. P0139 - O2 Sensor 1/2 Slow Response (2011 models)
c. P0159 - O2 Sensor 2/2 Slow Response (2011 models)
On 2011 models, the cruise control ON switch may appear inoperative when attempting to
turn the cruise system on. The software could potentially mature DTC, P0591 - Speed
Control Switch 2 Performance (which does not cause MIL illumination). The customer
complaint will be that the cruise control did not turn on or that cruise control turned off
inadvertently, but functioned as expected during the next key cycle.
On 2011 2 - door Wrangler's models, the customer may also experience a condition known
as "Idle Buffeting" while the vehicle is idling. This condition can be similar to driving a 4
door model down the road with one rear window down and all others rolled up, causing a
thumping or buffeting sound.
Updating the PCM software will correct the conditions listed above.
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You still under 36,000 miles?