Technical Question -
LinkBack Thread Tools
post #1 of 3 Old 10-17-2002, 12:29 PM Thread Starter
Registered User
Join Date: Oct 2002
Location: Charlotte
Posts: 2
Technical Question

Hi All,

I'm hoping one of you Jeep vets out there can help shed some light on a topic for me.

I have a 95 Grd Cherokee w/ the inline 6 cylinder. It idles rough, and has stalled in the past. The local dealership says its the Idle Air Control that's gone bad and is causing the problem.

When I run the self-diagnostic on the Jeep, I get codes 12 and 17.

I belive code 12 is:
"Direct battery input to PCM was disconnected within the last 50-100 key-on cycles. "

and code 17 to be:

"Engine did not reach operating temperature within acceptable limits. Engine does not reach 20 F. within 5 minutes with a vehicle speed signal."

Can anyone out there shed some light on what these two codes mean - and more importantly, what is required to fix them myself (if possible).

I can't tell if these codes are related to the IAC like the dealer says. What would be causing code 12 and 17?

Any help would be greatly appreciated. I'm hoping that I can do this work myself in the coming weeks.

Best Regards,

~ Charlie

CSinnett is offline  
Sponsored Links
post #2 of 3 Old 10-17-2002, 06:38 PM
Registered User
Join Date: Jun 2002
Posts: 62
This is what I have found:

Code Diagnostic item
------ -------------------
17 Engine is cold too long

Check items: Engine coolant temperature sensor circuit
and connector / Engine coolant temperature sensor /

17 Closed loop temperature not reached (M/T)

Check items: Engine coolant temperature sensor circuit
and connector / Engine coolant sensor / Thermostat

good luck.
gcl97 is offline  
post #3 of 3 Old 10-18-2002, 07:57 AM Thread Starter
Registered User
Join Date: Oct 2002
Location: Charlotte
Posts: 2
this is exactly what I was looking for - thank you very much for this.

I replaced the IAC valve last night and that seemed to rememdy the rough idle - but I haven't checked to see if it shows a different diagnostic code yet.

The car is getting up in miles though, and I'd like to be pro-active in replacing parts. Hopefully, the engine thermostat and coolant sensor related to code 17 isn't too difficult.

Thanks again - I do appreciate it.

CSinnett is offline  

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
technical question ZJPunk98 ZJ Grand Cherokee Forum 9 07-29-2008 01:56 PM
Technical Manual GC '06 - ? Bishop609 WK Grand Cherokee & XK Commander Forum 7 02-27-2008 03:13 PM
what is the technical name for these? mdsuave13 ZJ Grand Cherokee Forum 2 12-07-2006 09:49 AM
Technical help Paul Vachon ZJ Grand Cherokee Forum 21 08-11-2005 03:59 PM
Technical Help? Kafn8td ZJ Grand Cherokee Forum 7 04-25-2005 04:16 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome