Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 10-10-2013, 06:44 AM   #1
Registered User
 
Join Date: Nov 2012
Location: Tennessee
Posts: 25
Flashing Coolant Light

I have developed a slow flashing coolant light, which I understand equates to either a coolant level problem or a engine compt. fan. I have confirmed my coolant level is correct.

My question is, how do I check the operation of the engine compt. fan and is there a way to check the coolant level sensor? I do not own a durametric to run the fan.

Thx in advance. This is an 02 base.
Richard Bruce is offline   Reply With Quote
Old 10-10-2013, 07:51 AM   #2
Registered User
 
Join Date: Jul 2011
Location: USA
Posts: 67
This same thing happened to me. If you turn off the ignition after driving a few blocks then re-start the car does the flashing light go off? My coolant level was spot on as well, I just needed to add a couple tablespoons of coolant and took care of the problem.
Uller God is offline   Reply With Quote
Old 10-10-2013, 09:14 AM   #3
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,053
Quote:
Originally Posted by Richard Bruce View Post
I have developed a slow flashing coolant light, which I understand equates to either a coolant level problem or a engine compt. fan. I have confirmed my coolant level is correct.

My question is, how do I check the operation of the engine compt. fan and is there a way to check the coolant level sensor? I do not own a durametric to run the fan.

Thx in advance. This is an 02 base.
You will need either the Durametric system or access to a PIWIS unit to test the engine compartment fan without taking the car apart to manually test the fan.

The coolant level sensor is located at the bottom of the surge tank in the rear trunk, and can be accessed by pulling the carpet back. The rate of the flashing light also will tell you what is up:

"Four functions of the coolant warning light:
1. Engine coolant level too low -- light flashes slowly (0.5 Hz)
2. Engine compartment temperature too high -- light flashes slowly (0.5 Hz) (engine compartment blower might be faulty)
3. Engine coolant temperature too high -- light is lit; pointer on the right
4. Temperature sensor at water outlet faulty -- light flashes rapidly (1 Hz) ; pointer on the right
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein

Last edited by JFP in PA; 10-10-2013 at 09:20 AM.
JFP in PA is offline   Reply With Quote
Old 10-10-2013, 01:48 PM   #4
Registered User
 
Join Date: Nov 2012
Location: Tennessee
Posts: 25
Thx guys for the response, I actually did try to reset it by shutting it down and starting it back up, no help. I have determined it is flashing slowly (1 flash every 2 secs.) so this leads me to either the coolant sensor or the engine fan. I was curious if there was any test procedure with perhaps an ohmeter that I could check the coolant sensor. And by the way does anyone know how the coolant sensor detects level when it is not physically emersed in fluid?
Thx in advance
Richard Bruce is offline   Reply With Quote
Old 10-10-2013, 02:44 PM   #5
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,053
Quote:
Originally Posted by Richard Bruce View Post
Thx guys for the response, I actually did try to reset it by shutting it down and starting it back up, no help. I have determined it is flashing slowly (1 flash every 2 secs.) so this leads me to either the coolant sensor or the engine fan. I was curious if there was any test procedure with perhaps an ohmeter that I could check the coolant sensor. And by the way does anyone know how the coolant sensor detects level when it is not physically emersed in fluid?
Thx in advance
Again, either the Durametric system or a PIWIS can directly read the water temperature sensor while it is still in the engine.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 10-10-2013, 03:11 PM   #6
Registered User
 
Join Date: Nov 2012
Location: Tennessee
Posts: 25
Correction on my last post, the slow flashing light leads me to the coolant level sensor or the engine fan.
Richard Bruce is offline   Reply With Quote
Old 02-22-2014, 02:20 PM   #7
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,253
See here for explanation of how sensor works:

http://986forum.com/forums/performance-technical-chat/50904-how-coolant-tank-sensor-works.html#post388051
__________________
2001 Boxster, 5 spd, Seal Grey
clickman is offline   Reply With Quote
Old 02-22-2014, 03:10 PM   #8
Registered User
 
jeffm's Avatar
 
Join Date: Mar 2013
Location: Atlanta
Posts: 109
I had a slow blinking coolant light turn on after having the overflow tank replaced on my 911. The dealer (non Pcar) had some random shop replace the tank prior to delivering the car. I chased around the coolant level, attempted to purge air, replaced the cap, etc... for well over a week. Brought it to my Indy and the dx was a bad sensor.
The sensor is not part of the replacement tank and I believe the previous shop damaged it while replacing the tank.
jeffm is offline   Reply With Quote
Reply


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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 08:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page