P2181 and normal coolant temperature reading - NewBeetle.org Forums
NewBeetle.org Forums
Go Back   NewBeetle.org Home > NewBeetle.org Forums > Discussion - Technical > 2.0 Liter Gas

2.0 Liter Gas Discussion area for the venerable 2.0 liter 4-cylinder engine.

NewBeetle.org is the premier Volkswagen Beetle Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 05-23-2012, 04:30 PM
New Member
 
Join Date: May 2012
Default P2181 and normal coolant temperature reading

Hello,
My 04 beetle (2.0 L) threw a P2181 code in Sep. 2011. I had the code cleared and read related threads in this forum. It's been quiet since then until this May. The same code showed up again. I cleared it and it came back after 2 days with the same code.
Today I checked the coolant temperature on a local drive. It started normal and then increased to about 170F. It stayed at 170F for about 5 min and then increase to about 200F. It fluctuated from 195 to 210F afterwards. The check engine light was not on during this 1-hr drive.
I was wondering if someone could comment on this observation. I am not sure if this is normal. I do have the notorious black coolant temperature sensor, and plan to switch to the green one. Still I am a little hesitant without collecting more input.
Thank you all in advance for any help or suggestions.

PS. My wife is also complaining about slow idling. I just had the oil changed and all fluid levels checked, so no clue what to do next.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-23-2012, 10:09 PM
Smileybug's Avatar
5/23/10 <3
 
Join Date: Sep 2005
Location:
Cary, NC, USA
Car: 1999 Techno Blue GL 2.0 5-speed (RIP), 1984 Jetta GL TD, 2003 20th GTI
Default

Change the sensor first. Then worry about values later. Though the numbers sound about right, maybe a bit high, but the temps would probably drop due to the fans kicking on.
__________________
The Past Ride: Darla, 102k, '99 New Beetle GL 5-speed. Bone stock. Acquired 4/6/05. Gave her life for me 8/17/11. RIP
The Project: Klaus, 180k+, '84 Jetta GL Turbo Diesel. Rebuilt and bringing 50+ mpg. Slightly improved from stock Acquired 7/12/08
The Baby Brother: GŁnther, 129k, 20th Anniversary Edition GTI
The money saver:2001 Jetta TDI GL. 132k. Dead auto, swapped to 3 pedals. Hubby's DD and our trip car
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-24-2012, 05:07 AM
New Member
 
Join Date: May 2012
Default

Quote:
Originally Posted by Smileybug View Post
Change the sensor first. Then worry about values later. Though the numbers sound about right, maybe a bit high, but the temps would probably drop due to the fans kicking on.
Thanks for the reply. What do you think of the fluctuation? I got a Tiguan last year and noticed that the coolant temperature stays at 190F after warming up and is very very stable. I don't know if new beetle uses a similar mechanism to control the temperature, but the fluctuation observed on my new beetle seems odd in comparison with the Tiguan.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-24-2012, 01:05 PM
Smileybug's Avatar
5/23/10 <3
 
Join Date: Sep 2005
Location:
Cary, NC, USA
Car: 1999 Techno Blue GL 2.0 5-speed (RIP), 1984 Jetta GL TD, 2003 20th GTI
Default

I don't think you're going to see the temp gauge move on new cars very much. I'm sure the temp does fluctuate (the fans will come on when it gets to a certain temp and then shut off after its cooled) and we can see that in our old '84 Jetta. But these new temp gauges aren't really the best gauges from what I understand. They are good enough to know if you aren't getting warm enough or overheating, but they aren't really going to fluctuate. I've not seen any car of ours that is '00 or newer that really fluctuates the gauge. But the temp will change a bit.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-24-2012, 09:22 PM
New Member
 
Join Date: May 2012
Default

That's very good to learn. Thank you!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the NewBeetle.org Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Coolant Temperature Sensor....gone bad? orangeshrimp72 1.8 Liter Turbo 9 09-29-2010 01:04 AM
what is normal coolant temp for a 2.0 fuelman 2.0 Liter Gas 6 07-16-2010 03:57 AM
Normal Guage Reading for Oil and Temp Scorpius 2.0 Liter Gas 1 10-18-2009 04:22 PM
What is 'normal' operating coolant temperature? dblvsn 1.9 Liter TDI 5 02-26-2008 08:34 PM
which coolant temperature sensor? strorg 2.0 Liter Gas 4 10-31-2007 11:02 AM

All times are GMT. The time now is 08:05 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2