Go Back   Jeep Liberty Forum - JeepKJ Country > Jeep Liberty - KJ (02 to 07) > KJ General Discussion



KJ General Discussion

P1281 Error 2002 Jeep Liberty


This is a discussion on P1281 Error 2002 Jeep Liberty within the KJ General Discussion forums, part of the Jeep Liberty - KJ (02 to 07) category!
Hi all, My 2002 Jeep Liberty has had the engine light going on and off recently and it keeps coming ...

General discussion forum for KJ Liberty's


Like Tree1Likes
  • 1 Post By LibertyTC

Reply
 
LinkBack Thread Tools Display Modes
Old 02-08-2019, 03:14 PM   #1 (permalink)
Member

 
Join Date: Feb 2019
Location: NC
Age: 51
Posts: 2
Default P1281 Error 2002 Jeep Liberty

Hi all,
My 2002 Jeep Liberty has had the engine light going on and off recently and it keeps coming back with the P1281 (Engine is cold too long) error code. We had a new T-stat put in back in October 2017 by a local repair shop. The heater core was replace about a year before that along with the radiator. Since the engine light keeps going on then off I'm not convinced its the t-stat and wondering if it might be the sender for the tstat.

We've tried running the car and then touching the radiator hose compared to the heater core hose and the heater core hose heats up quicker than the radiator hose.

We've watched the temp gauge and it doesn't get passed the middle

We've timed the temp gauge getting up to the middle and it takes about 15 mins

We've checked the heat in the vehicle and it blows hot

We've checked the coolant level and it's fine

Any ideas?? Should we replace the t-stat?
brianjeep is offline   Reply With Quote
Old 02-08-2019, 04:47 PM   #2 (permalink)
 
LibertyTC's Avatar
Super Mod

 
Join Date: Oct 2008
Location: B.C. Canada
Posts: 5,892
Default

The thermostat could be stuck in the open position.
Only the Mopar thermostat should be used, what brand is in the Jeep now?

By plugging into the OBD2 with a scan gauge or diagnostic reader, you can see the exact temp reported by the temp sensor. (fWT- Fahrenheit water temperature)
JasonJ likes this.
__________________
2004-OME Lifted-Bilstien-3/8 Top Steel Spacers-JBA4.5 A-Arms- PML Trans Pan-Riddler Cover-SpiderTrax Wheel Spacers-17"Silent Armor Tires-Setina PB400 PushBar-Rola Basket
Piaa Bulbs-Fogs 65W Mod- LED Puddle & Under Hood Lights- WeatherTech Mats/Mudflaps-Autel MaxiTrip OBDII Gauge& Scan Reader. Upgraded Stereo-USB Bluetooth Sat Radio.
See The Benefits Of Becoming A Supporting Member!
http://www.jeepkj.com/forum/payments.php

Last edited by LibertyTC; 02-08-2019 at 04:55 PM. Reason: add second image of scan gauge
LibertyTC is online now   Reply With Quote
Old 02-08-2019, 04:59 PM   #3 (permalink)
Member

 
Join Date: Jul 2017
Location: Sin City
Posts: 68
Default

Sounds like a stuck open thermostat to me.

the only confuser for me is when you say the two hoses are cold/hot.
It is hard to compare the temperature of each hose at any point in the start/warmup if I am not sure which hose you are talking about.

Typically if the thermostat is stuck open the hose feeding the heater core should heat up at the same time as the lower radiator (upper radaitor hose may take significantly longer, as well as the heater core return hose).

If thermostat is shut (as it should be when cold), the heater core still gets warm coolant from the engine, so the hose feeding the heater core will be warm but the lower radiator should be cool until the engine gets to temp.

But thermostats can have lots of problems outside simply stuck shut or open, which is why folks say go mopar or you will just end up going back to the parts store soon.

Last edited by mrlavalamp; 02-08-2019 at 05:05 PM.
mrlavalamp is offline   Reply With Quote
Old 02-09-2019, 11:05 AM   #4 (permalink)
Moderator

 
Join Date: Jul 2005
Location: Southeastern Ohio
Age: 64
Posts: 16,689
Default

I would start with MOPAR thermostat, others no matter from where do have issues
__________________
I'm just here to comfort disturbed people and disturb comfortable people.
MUDD'S MOTORSPORTS
I DO IFS LIFT INSTALLS
04 Kilimanjaro Edition
4.5 INCH JBA LIFT/ 32s/4.10s/ etc
03 OVERLAND EDITION, Timberline Green Pearlcoat, JBA 2.5 inch Total Control Lift, Kilby gas tank skid, Skid Row, 4XGuard mixture, MOABs, 265-70-16s, 4.10s, Mudds bumper
05 Limited/stock for now
tommudd is offline   Reply With Quote
Old 02-11-2019, 07:41 AM   #5 (permalink)
Member

 
Join Date: Feb 2019
Location: NC
Age: 51
Posts: 2
Default

Thanks for the replies. I don't know what brand of t-stat was installed since it was done by my local repair shop, not by myself. It's just odd that the engine light comes on and off. If the t-stat is stuck open I would expect the light to stay on. Sounds like the only plan would be to get a new MOPAR t-stat and install.
brianjeep is offline   Reply With Quote
Old 02-11-2019, 09:07 AM   #6 (permalink)
Member

 
Join Date: Jul 2013
Location: Michigan
Posts: 1,348
Default

Originally Posted by brianjeep View Post
Thanks for the replies. I don't know what brand of t-stat was installed since it was done by my local repair shop, not by myself. It's just odd that the engine light comes on and off. If the t-stat is stuck open I would expect the light to stay on. Sounds like the only plan would be to get a new MOPAR t-stat and install.
The MIL goes on and off because the condition is not persistent... sometimes it is present, other times not.. if it doesn't detect it after so many key cycles, it stores the code and turns the light off.

Considering that the t-stat is a thermal-mechanical part, the spring and valve could be periodically (but not always) sticking, or binding, causing your issue.

I think on these engines, it's also critical that the vent hole be positioned exactly a certain way as well... not just, toss it in there and go.
JasonJ is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On




GM Truck Forum
Ford Raptor Forum
Chevy Tahoe Forum
Chevy Cobalt Forum
Chevy Camaro Forum
Toyota FJ Cruiser Forum
Ford Truck Forum
88-98 GM Truck Forum
73-87 Gm Truck Forum
Ford Expedition Forum
Chevy Equinox Forum
Chevy Cruze Forum
Dodge Ram Forum
Jeep Forum
Dodge Ram SRT10 Forum
Chrysler 200 Forum
Scion xD Forum
Scion xB Forum
Dodge Challenger Forum
SRT Forum
Nissan Titan Forum
Buick Enclave Forum
Cadillac Forum
Cadillac XTS Forum