Results 1 to 5 of 5
-
01 June 2018 #1
- Join Date
- 11 Oct 2017
- Location
- New Hampshire
- Posts
- 11
- Saab(s)
- 2008 9-5 2.3T
2008 9-5 2.3T- new error code- P1312
So I finally changed the upstream O2 sensor over the weekend and the engine light went off. For three days. Now it reappeared and decided to stick around for a while. I drove to AutoZone and the code "P1312" appeared on the scan tool, which means, "the PCM detected that the oxygen sensor 1 circuit voltage continuously exceeded the maximum allowable value for a specified number of combustions." In their system, P1312 is an "Ignition Coil "B" Primary/Secondary Circuit."
This was the exact same message I received about two months ago when I interpreted this as the upstream O2 sensor needed replacing. Now that it is back on after installing a new Bosch OE O2 sensor, I have no idea what to make of this.
There are no misfires, no out of the ordinary sounds or performance of the motor. Everything seems to run fine other than this code. If someone would shed some light on this it would be a great help to me. Thanks in advance.
-
01 June 2018 #2
Frank Administrator
- Join Date
- 30 Jul 2010
- Location
- USA - Netherlands
- Posts
- 7,901
- Saab(s)
- previous: 2006 9-3, 2001-06 9-5, 2011 9-4X
P1312 is a failing DIC. The engine can run great for a while but eventually it will fail and leave you stranded on the side of the road. The code may go away for a while after the CEL is reset but eventually will return.
Replace with an OEM DIC and do the spark plugs at the same time.
-
01 June 2018 #3
- Join Date
- 11 Oct 2017
- Location
- New Hampshire
- Posts
- 11
- Saab(s)
- 2008 9-5 2.3T
Nordwulf-Thanks for the help. Two questions. First, the OE spark plug is NGK R double platinum, and according to the DIC cartridge only resistor plugs can be used, which they are. I have always been partial to Bosch and Denso but I cannot find any confirmation that their plug is a resistor plug, so your thoughts would be appreciated. Second, if you would know the torque setting for the spark plug, or where to find it, that would be appreciated as well.
-
01 June 2018 #4
Frank Administrator
- Join Date
- 30 Jul 2010
- Location
- USA - Netherlands
- Posts
- 7,901
- Saab(s)
- previous: 2006 9-3, 2001-06 9-5, 2011 9-4X
Only use the NGK plugs, they are the best match for the engine. Auto parts stores will tell you differently but Saab knows better.
You don't have to use a torque wrench when installing these plugs but you can: 28 Nm / 21 lb ft
More info about changing the spark plugs can be found here: http://saabworld.net/showthread.php?t=25916
-
01 June 2018 #5
- Join Date
- 11 Oct 2017
- Location
- New Hampshire
- Posts
- 11
- Saab(s)
- 2008 9-5 2.3T
Thanks for the forward to the tutorial, very clear and helpful. If I read the NGK website correctly, the plugs are pre gapped to 0.040 in., but perhaps keeping a gap tool in the garage is not such a bad idea. My best to you for the advice.
Similar Threads
-
Saab 9-3 P1312 code, loss of power and uneven running
By garciasa0290 in forum Saab 9-3 (2003-2014)Replies: 30Last Post: 02 February 2018, 03:01 -
Code error D7591 ETS
By Fess in forum Saab 9000 (1985-1998)Replies: 2Last Post: 08 October 2015, 21:47 -
P1312 and P1334 error codes
By acer54 in forum Saab 9-5 (1998-2009)Replies: 4Last Post: 27 May 2015, 09:58 -
P1312 Error Code Issues
By J Frank Parnell in forum Saab 9-5 (1998-2009)Replies: 3Last Post: 12 November 2014, 11:50 -
Code p1312 & p1334
By Ken Higham in forum Saab 900 and 9-3 (1994-2003)Replies: 3Last Post: 11 April 2013, 12:45