Welcome to the world of Saab ! Register
Results 1 to 2 of 2
  1. #1

    Join Date
    11 Feb 2018
    Location
    Mexico
    Posts
    2
    Saab(s)
    2004 9-3 SS MT
    Thumbs Up:   0

    Unhappy Sudden loss of power and rough idle / B207L engine

    Hi guys, I'm dealing with this problem with my 2003 Linear 4cil 2.0t MT, B207L engine. :

    All perfect and no codes at startup, but approx. when the engine reaches its operating temp, then it comes code P0606, and the car losses much of its power + rough idle, I assume it goes into Limp Home Mode as no messages appear on SID. If in this situation I clear the codes with a generic bluetooth OBDII scanner, the problems go away and I can drive the car normally for about 1 or 2 minutes and then again P0606 and Limp Home. Occasionally Code P0638 also shows up, but changing the throttle body with a good one didn't make a difference.
    My First thought was the ECU was Fried, but, why would clearing the codes solve the problem temporarily ? any Ideas?

    0 Not allowed!

  2. #2
    Saab Owner Digger's Avatar
    Join Date
    28 Oct 2016
    Location
    Minneapolis Minnesota
    Posts
    738
    Saab(s)
    2006 9-3 2.0t SportCombi
    Thumbs Up:   119
    Quote Originally Posted by Saabero View Post
    My First thought was the ECU was Fried, but, why would clearing the codes solve the problem temporarily ? any Ideas?
    The ECU is a special purpose computer and like a PC, restarting can fix a program that has gotten unstable. Resetting the ECU is like restarting a computer and sometimes you need to pull the plug to get the computer to forget a bad instruction, so pull the battery cable and if the problem goes away and stays away, great. If not you have a real problem that means doing something with the Trionic 8.

    0 Not allowed!

 

 

Similar Threads

  1. Rough idle and smoke
    By tjharring in forum Saab 9-3 (2003-2014)
    Replies: 7
    Last Post: 05 June 2017, 02:36
  2. rough idle and nearly stalling
    By kratoct in forum Saab 9-5 (1998-2009)
    Replies: 10
    Last Post: 01 July 2013, 15:42
  3. Help! Pop followed by power loss and turbo in red!
    By DIY Diva in forum Saab 9-5 (1998-2009)
    Replies: 2
    Last Post: 03 August 2012, 21:16
  4. 9-5 1.9 TiD rough idle when cold
    By Pcroft in forum Saab 9-5 (1998-2009)
    Replies: 0
    Last Post: 11 May 2012, 09:00
  5. Rough Idle After Engine or Cylinder Head Repair - Cam Alignment Tool PIC4286C
    By Burnsside42 in forum Diagnostics and documentation
    Replies: 0
    Last Post: 07 March 2012, 13:00

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT. The time now is 16:00.
Powered by vBulletin® Version 4.2.5
Copyright © 2018 vBulletin Solutions Inc. All rights reserved.