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Ron, ASE Certified Technician
Category: Saab
Satisfied Customers: 35527
Experience:  ASE Certified Tech
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I keep getting a "torque limitation signal low (P1300)"

Customer Question

I keep getting a "torque limitation signal low (P1300)" error code on my 2003 Saab 9-3 SE Convertible. Replaced the DIC six months ago with aftermarket unit because of misfire codes. CEL also flashes when I accelerate into the "yellow range" on the turbo guage. When I put the old DIC back in the P1300 code disappears, but then I'm back to the misfire codes. Replaced spark plugs with genuine OEM plugs. Replaced any suspiciuos vacuum lines. The car runs fine, just irratating to see CEL all the time. Wondering is the problem is the aftermarket DIC. Any thiughts?
Submitted: 1 year ago.
Category: Saab
Expert:  Ron replied 1 year ago.

Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

The code P1300 can be set due to any of the following,

  • Sticking Boost Control Solenoid (BCS)
  • Leaking Boost Control Solenoid (BCS) Vacuum Lines
  • Boost Leak

    In order to determine the cause you are going to need to do some testing. I have enclosed the steps in the link below, copy and paste the link to your browser to open and view them.

Customer: replied 1 year ago.
Replaced boost control valve, still gives error code. I haven't checked all of the vacuum lines leading to it. Will do that next and see what happens.
Expert:  Ron replied 1 year ago.

Yes please do and let me know. Im here all day.

Customer: replied 1 year ago.
I think this is what you are talking about in terms of boost control solenoid, right?
Expert:  Ron replied 1 year ago.

Yes thats correct

Customer: replied 1 year ago.
Ok, I'll check each line and let you know.
Expert:  Ron replied 1 year ago.

Sounds good. Good luck

Customer: replied 1 year ago.
Checked all vacuum lines to boost valve. They all look good. Sprayed W-D on them looking for bubbles and there was no change in engine RPM. MAF sensor looked clean and unobstructed. Did find something that didn't look right. One of the vacuum lines that connects to the boost valve through a T that leads to the throttle body has two check valves (PCV) that have flow indicators pointing in the opposite direction. Doesn't look right to me. See pics.
Customer: replied 1 year ago.
Waiting for a response from someone regarding my last question. Is there anyone out there?
Customer: replied 1 year ago.
Still waiting for a response to my question. It has been 4 days.