Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

TEMP GUAGE NEEDLE LEFT .RAPID RED LIGHT


Recommended Posts

SCANNER READS ENGINE TEMPS CORRECT AND FANS COME ON AT 212 F . THE GUAGE DOES NOT MOVE AT ALL LIKE ALL GUAGE NEEDLES DO WHEN YOU GO KEY ON . RAPID RED WARNING  LIGHT ON TEMP GUAGE. DOES ECM GET A SIGNAL FROM A SEPARATE SENDER  ? OR DO I HAVE A GUAGE PROBLEM ?

Link to comment
Share on other sites

  • Moderators

Welcome to RennTech :welcomeani:

 

First of all, posting in all caps is considered rude by many posters, and is completely unnecessary.

 

Most likely, your problem is a filled temperature sensor on the engine, but I would not be driving the car until a shop can confirm and repair the issue.  These engines are very sensitive to damage caused by overt heating, and with an inoperative dash display you really don’t know where the actual temp is.

Link to comment
Share on other sites

Sorry for the caps , was frustrated and in a hurry . What is a “filled temperature sensor “ and how does the ECM know the temp. so as to tell the scanner live readings that I see and tell the fans to come on at 212 F ? Thanks for your help . 

Link to comment
Share on other sites

  • Moderators
1 hour ago, BIG BEAR said:

Sorry for the caps , was frustrated and in a hurry . What is a “filled temperature sensor “ and how does the ECM know the temp. so as to tell the scanner live readings that I see and tell the fans to come on at 212 F ? Thanks for your help . 

 

Sorry for the typo, it should have read "fluid temperature sensor"  The DME monitor's the sensor electrically and converts that signal into temperature; when the limit is reached in the DME's softweare, the fans switch on until the temperature drops.

Link to comment
Share on other sites

Hello

So the DME is seeing a functioning fluid temp sensor  ?  Also if I disconnect the coolant temp sensor it throws a check engine light with a coolant sensor code . So this  should say the sensor is good ?  Whats worse is the OE wire diagram of the                                     “ guage  cluster “  shows no temp guage what so ever and no communication circuits from any ECMs to a temp guage . As if it dose not exist . Any ideas about that .

 

Thanks for your time .  

Link to comment
Share on other sites

  • Moderators
2 hours ago, BIG BEAR said:

Hello

So the DME is seeing a functioning fluid temp sensor  ?  Also if I disconnect the coolant temp sensor it throws a check engine light with a coolant sensor code . So this  should say the sensor is good ?  Whats worse is the OE wire diagram of the                                     “ guage  cluster “  shows no temp guage what so ever and no communication circuits from any ECMs to a temp guage . As if it dose not exist . Any ideas about that .

 

Thanks for your time .  

 

The DME gets the single from the temperature sensor and communicates with the cluster via CAN Bus.  Disconnecting the temp sensor throws a "no sensor" code, but does not mean that the sensor is good by default.  The coolant temp sensor can be read live (actual temp values) using a Porsche scan tool.  If suspect bad, replace it, it is not that expensive or difficult.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.