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  1. #1

    Join Date
    21 Jun 2015
    Location
    United States
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    3
    Saab(s)
    2006 9-3 Convertible 2.0T
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    P1312 code

    Can't seem to find an answer for the P1312 error on my 2006 9-3 2.0T convertible; it doesn't seem to have a DIC and I replaced all four plugs (OEM recomended NGK plugs). It still sputters when accellerating, no certain RPM range, and it evens out when you step off the gas, any ideas?

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  2. #2
    Frank Wulfers
    Administrator
    Join Date
    30 Jul 2010
    Location
    NW Michigan, USA
    Posts
    7,410
    Saab(s)
    previous: 2006 9-3, 2001-06 9-5, 2011 9-4X
    Thumbs Up:   32
    < moved your post to a new thread in the 9-3 workshop forum>

    Each sparkplug has its own ignition coil in the 9-3 4-cylinder and not a DIC like the 9-5.

    P1312 for the 9-3 in the WIS: Ionization Signals Implausable, Sooted Sparkplugs

    Carbonized spark plug
    Electrical fault in connected leads or in ignition coils and CDM (Combustion Detection Module)

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  3. #3

    Join Date
    21 Jun 2015
    Location
    United States
    Posts
    3
    Saab(s)
    2006 9-3 Convertible 2.0T
    Thumbs Up:   0
    Quote Originally Posted by Wulf View Post
    < moved your post to a new thread in the 9-3 workshop forum>

    Each sparkplug has its own ignition coil in the 9-3 4-cylinder and not a DIC like the 9-5.

    P1312 for the 9-3 in the WIS: Ionization Signals Implausable, Sooted Sparkplugs

    Carbonized spark plug
    Electrical fault in connected leads or in ignition coils and CDM (Combustion Detection Module)
    Wulf, thank you for the quick reply, hadn't seen anything in prior threads about the WIS (?) and the plugs I pulled weren't sooty. Any recommendations on whether I start replacing the ignition coils or the CDM next ?

    Thanks,
    Pete

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  4. #4

    Join Date
    21 Jun 2015
    Location
    United States
    Posts
    3
    Saab(s)
    2006 9-3 Convertible 2.0T
    Thumbs Up:   0
    Just FYI for anyone who googles CEL P1312 and finds this thread; I made the same mistake everyone does with after-market ignition coils and they generated more CEL. Assuming P1312 is misfire in cylinder 1 & 2, I guessed those were first two cylinders from the left while facing the engine but after some trial and error I think the cylinder numbers are 1 through 4 from driver side because she's running good with those two far right coils replaced. O'Reilly Auto Parts does carry the correct Saab/Mitsubishi coils at $122 each (mfr Direct Import) for my 2006 9-3 2.0T. Sometimes it works out to be a YouTube Mechanic.

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  5. #5
    Saab Fan
    Join Date
    28 Mar 2017
    Location
    Miami Fl
    Posts
    8
    Saab(s)
    2004 Saab 9.3 Arc
    Thumbs Up:   1
    Hey can you help I have the same code p1312 and p0340

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  6. #6
    Frank Wulfers
    Administrator
    Join Date
    30 Jul 2010
    Location
    NW Michigan, USA
    Posts
    7,410
    Saab(s)
    previous: 2006 9-3, 2001-06 9-5, 2011 9-4X
    Thumbs Up:   32
    Hrod, you already posted this here and got many helpful replies: http://saabworld.net/showthread.php?t=33325

    Perhaps you should consider taking your car to a Saab service center.

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  7. #7
    Saab Fan
    Join Date
    08 Oct 2017
    Location
    Pittsburgh Pa
    Posts
    5
    Saab(s)
    2007 9-3 2.0T Sport Combi
    Thumbs Up:   0
    I'm having a similar issue with my 2007 9-3 2.0T but the issue only occurs when I am at high speeds 70mph+ and I accelerate pushing my turbo. As soon as it hits the red, the engine starts to shudder. Feels like misfiring but not sure. It's pretty bad so as soon as I feel it, I lay off the pedal and it goes away immediately. So it's definitely engine, and not alignment balance, etc. Shortly afterwards I got the P1312 code. Changes the plugs to the NGK recommended, put new OEM coil packs on cylinder 1 & 2. Problem persists. Tried swapping packs to position 3&4 and cleaned MAS. I'm thinking this is not ignition coil at all. Thoughts?

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