SPONSORED LINKS

1991 Buick Century 3.3L 65k miles

Tiny
DOCHAGERTY
  • MECHANIC
  • 1991 BUICK CENTURY
What does it indicate when fault codes can not be erased. I have a century limited that I have had for too
long now and the damn thing will not let me erase the faults 22 and 43. I have left the battery disconnected
overnight to no avail.
this is starting to look like it is time to replace the PCM
any ideas anyone
SPONSORED LINKS
Friday, November 2nd, 2007 AT 1:59 PM

4 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
To clear the codes,turn the key on and ground terminal B on the ALDL connector Thurn the key off and remove the control mod fuse for 10 seconds, replace the fuse and the ground lead.
Then do a field service check if the codes clear!


https://www.2carpros.com/forum/automotive_pictures/62217_ALDL_2.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Knock_copy_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_Field_service_copy_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_TPS_copy_1.jpg

SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, November 2nd, 2007 AT 2:28 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Thanks merlin, I will start over and follow your suggestion
and let you know
Dr. Hagerty
Was this
answer
helpful?
Yes
No
Friday, November 2nd, 2007 AT 4:43 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Codes still present after multiple attempts to clear
Was this
answer
helpful?
Yes
No
Saturday, November 3rd, 2007 AT 6:39 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Did you try tracing the knock sensor yet? Try removing the battery cable and unpluigging the ecm.
Was this
answer
helpful?
Yes
No
Saturday, November 3rd, 2007 AT 9:46 AM

Please login or register to post a reply.

Related Engine Computer Replace/Remove Content

VIEW MORE

Sponsored links