FYI - Plugged in Block Heater can trip the Check Engine Light - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Compass & Patriot Forum > FYI - Plugged in Block Heater can trip the Check Engine Light

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineYear End Clearance Sale! Save 20%Warn, Smitybilt, Engo, Rugged Ridge Winches at CCOR

Reply
Unread 01-12-2010, 12:29 PM   #1
Knightfallzx2
Registered User
2008 MK Compass 
 
Join Date: Feb 2008
Location: Winnipeg, MB, Canada
Posts: 227
FYI - Plugged in Block Heater can trip the Check Engine Light

We've had that annoying little Check Engine light come on a few times last year during winter, and now once again this year.

We brought it by the stealership and apparently, if you happen to start the car while your car is still plugged in, it can upset the Jeep's computer. It's been a known problem with the '08s. They ended up flashing the computer to update the firmware.

I admit, I normally start the car, and then go unplug it. Sometimes I do it the other way around. I've never known it to be an issue before. Although now that the computer is flashed, it's supposed to be alright now.

Just thought I would share the experience to fellow MK owners - especially those with the block heater.

__________________
2008 Jeep Compass North 4x4
Black Crystal Pearlcoat, 5-speed
View my iPod integration kit tutorial.
Read my Blog on Jeepspace
Knightfallzx2 is offline   Reply With Quote Quick reply to this message
Unread 01-19-2010, 02:05 AM   #2
rpiereck
Registered User
1998 TJ Wrangler 
 
Join Date: May 2009
Location: Fairbanks, AK
Posts: 690
Mine must be flashed already, none of that problem here. I start mine with the autostart everyday and no issues so far.
__________________

JKS Adjustable control arms - JKS 1.25" Body Lift - JKS 1" Engine Mount Lift
Old Man Emu 4" coils - Rancho 5000 shocks - Teraflex front adj trackbar - RE rear track bar bracket
33/12.5x15 Wrangler Duratracs - Tabor 12k Winch - Hella 500F Foglights
Hella Supertone Horns - Uniden CB radio

rpiereck is offline   Reply With Quote Quick reply to this message
Unread 01-19-2010, 10:26 AM   #3
miketmx
Registered User
2008 MK Patriot 
 
Join Date: Mar 2009
Location: Canada
Posts: 264
When we first got our Patriot I didn't think the block heater was working because it was so quiet compared to our Cherokee which makes a noise as soon as you plug it in. I took the Patriot to the dealer and they tested the block heater and said it was working just fine. I also use synthetic oil which makes starting in the winter a little easier. The only time I have ever seen the MIL light was during mid-summer in Illinois and I think it was a bad tank of gas. The light went away on our next fill up.
miketmx is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.