KIA TSB #122-2.4 GDI rough idle

[enmoco]

Engine 2013MY Sorento (XM)
w/2.4L GDI
NUMBER DATE
122-August 2012
TECHNICAL SERVICE BULLETIN
SERVICE ACTION: ECM UPGRADE –
2.4L GDI IDLE RPM STABILITY IMPROVEMENT (SA128)
This bulletin provides information related to the ECM software upgrade of some 2013MY
Sorento 2.4L GDI vehicles produced from March 6, 2012 to August 6, 2012 to improve
idle RPM stability while at a stop with A/C ON. It is important to note that the 2.4L GDI
engine has a certain level of harmonic vibration while at low idle RPM’s which is a normal
characteristic of this engine design. For confirmation that the latest reflash has been done
to a vehicle you are working on, verify ROM ID using the tables in this TSB. To ensure
maximum customer satisfaction, Kia is requesting the completion of this Service Action on
all affected 2013 Sorento vehicles.

[rminor]

I guess the rough idling '12's are not covered.

[Rick2456]

I had mine done today when I took it in for an oil change. Seem to smooth things out.

Originally Posted by enmoco

Engine 2013MY Sorento (XM)
w/2.4L GDI
NUMBER DATE
122-August 2012
TECHNICAL SERVICE BULLETIN
SERVICE ACTION: ECM UPGRADE –
2.4L GDI IDLE RPM STABILITY IMPROVEMENT (SA128)
This bulletin provides information related to the ECM software upgrade of some 2013MY
Sorento 2.4L GDI vehicles produced from March 6, 2012 to August 6, 2012 to improve
idle RPM stability while at a stop with A/C ON. It is important to note that the 2.4L GDI
engine has a certain level of harmonic vibration while at low idle RPM’s which is a normal
characteristic of this engine design. For confirmation that the latest reflash has been done
to a vehicle you are working on, verify ROM ID using the tables in this TSB. To ensure
maximum customer satisfaction, Kia is requesting the completion of this Service Action on
all affected 2013 Sorento vehicles.

[enmoco]

Originally Posted by rminor

I guess the rough idling '12's are not covered.

From the aforementioned TSB:

It is important to note that the 2.4L GDI
engine has a certain level of harmonic vibration while at low idle RPM’s which is a normal
characteristic of this engine design.

It would appear so.

[VIM]

Most cars are rougher at lower RPMs. That's the nature of momentum and ... yada, yada, yada. Most likely, the main thing the TSB does is to increase the minimum RPM so that it is less noticeable when under more load. It may do other things with air/fuel mixture of alternator output...who knows...

Some cars do not have an adjustable idle. However, with the onboard computers reprogramming the idle RPMs is probably what most car manufacturers do these days...instead of fiddling with carburetor adjustments...d'oh!

If those that have not had the TSB done yet can post their RPMs in different scenarios, we can compare the before and after RPMs with those that have had the TSB done:

• The RPMs when in park
• In park with AC on MAX
• In drive but stopped and with foot on brake
• In drive but stopped and with foot on brake and AC on MAX

Did I miss any?

[beaverboy56]

I had mine done 2 days ago, much much smoother idling in drive with max a/c....also have noticed a possible increase in gas mileage?!? On my same routes I've been getting an extra 2 mpg average so far (i've driven a full tank since the upgrade)

[dynamicsuv]

I am really glad to read this posting. I really appreciate OP sharing the good info.
I called to a nearby dealer but the service dept. staff didn't know about this technical issue.

Did you who got the service recently just brought your Sorento to any dealer shop or made it sure before going to the dealer?

I will try it very soon but I am concerning of "waste of time" since service staff said "What is it? I don't know about the issue..."

[enmoco]

Originally Posted by dynamicsuv

I am really glad to read this posting. I really appreciate OP sharing the good info.
I called to a nearby dealer but the service dept. staff didn't know about this technical issue.

Did you who got the service recently just brought your Sorento to any dealer shop or made it sure before going to the dealer?

I will try it very soon but I am concerning of "waste of time" since service staff said "What is it? I don't know about the issue..."

Welcome....Tell them you want "TSB #122".You should check the date of manufacture (plate on driver side doorjamb),as you must meet the stated range of affected units.

[dynamicsuv]

Dear enmoco,

Thanks a lot for your help! I will schedule a service sometime next week and share the results here for others.

Thanks again and have a great weekend!

[enmoco]

Originally Posted by dynamicsuv

Dear enmoco,

Thanks a lot for your help! I will schedule a service sometime next week and share the results here for others.

Thanks again and have a great weekend!

Thanks and best wishes.