Ionization sensing code


THFRO
12-19-2006, 03:35 PM
Have a 9-3 with a "ionization sensing irrelevant" error. Car is being driven short distances daily and according to the dealer, it is fouling out the plugs. Does anyone know anything about? Is it truly a car that can only be driven by people who live more than 10 minutes from their job?

MT-2500
12-19-2006, 03:47 PM
Have a 9-3 with a "ionization sensing irrelevant" error. Car is being driven short distances daily and according to the dealer, it is fouling out the plugs. Does anyone know anything about? Is it truly a car that can only be driven by people who live more than 10 minutes from their job?

Welcome on your first post.

Short trips without a full warm up is hard on any engine and exhaust system.
But a 10 miles trip should bring it up to full operating tempt is thermostat is working good.
But give us more info for us to help you like.

Tips on getting a good answer to your questions.
People trying to answer your question do not have a crystal ball.
So give them all of the info you have like year make and model and engine and transmission and mileage.
Also cars engine and transmission service history or any recent repairs or problems.
Also a description of your problem and what it is doing or not doing.
If you have codes give up the code no.
And remember a code does not say replace the part but only points to the problem that you have to check out.
So to better help you give up all of the info you have on it.
MT

SaabJohan
12-20-2006, 07:21 PM
It's difficult to say anything specific since the model/year/engine and fault code hasn't been specified.

In general I would recommend that you check the spark plugs, use only the NGK plugs recommended by Saab. Anything else than the OEM plugs is like asking for trouble. Make also sure that the plugs are fitted properly otherwise hot combustion gases might leak pass the seals and damaging the DI-system.

THFRO
12-20-2006, 09:03 PM
Okay, I will try again. Apologizes for the previous ambiguity. I should have known better. The only excuse I have is that it is a friend's car. It is a 2004, 9-3 with a turbocharged 2.0 and an auto trans. It has approximately 30,500 miles with no history of repairs. She took it in for a rough idle and what I can only assume is a bad miss (hesitation, sputtering). The code that was pulled was P1312 "Ionization Signal Implausible" and the spark plugs (original) are sooted. The dealer is asking that she return the car for cold start testing. While she does only live a few miles from work, she does at least let it warm up for a few minutes before driving. It is usually driven longer distances (40+ miles) at least once on the weekend. And help on this would be greatly appreciated. Thanks.

MT-2500
12-20-2006, 09:48 PM
Okay, I will try again. Apologizes for the previous ambiguity. I should have known better. The only excuse I have is that it is a friend's car. It is a 2004, 9-3 with a turbocharged 2.0 and an auto trans. It has approximately 30,500 miles with no history of repairs. She took it in for a rough idle and what I can only assume is a bad miss (hesitation, sputtering). The code that was pulled was P1312 "Ionization Signal Implausible" and the spark plugs (original) are sooted. The dealer is asking that she return the car for cold start testing. While she does only live a few miles from work, she does at least let it warm up for a few minutes before driving. It is usually driven longer distances (40+ miles) at least once on the weekend. And help on this would be greatly appreciated. Thanks.

It is more of a combustion signal detection code for 1&2 cylinders.
I do not think driving habits has anything to do with the problem
But a good one to let the dealer to fix.
Good luck and let us know how it goes.

MT-2500
12-20-2006, 10:10 PM
Here is a little repair info on it.
http://members.troublecodes.net/crunch/1312.pdf

THFRO
12-21-2006, 05:01 PM
Good link. :thumbsup:Thanks.
Don't know what that Ionization bull they gave her was all about.

MT-2500
12-21-2006, 06:34 PM
Good link. :thumbsup:Thanks.
Don't know what that Ionization bull they gave her was all about.

You are welcome and good luck with it.
And yes the Ionization stuff sounds strange.
You might have to get on there case.
Good Luck.
And let us know how it goes.
MT

maun
10-14-2007, 11:12 AM
Here is a little repair info on it.
http://members.troublecodes.net/crunch/1312.pdf



How do I get to this Ionization sensing code write up?
I keep getting a no access to this particular pdf write up.

MT-2500
10-14-2007, 11:54 AM
How do I get to this Ionization sensing code write up?
I keep getting a no access to this particular pdf write up.

This post is almost a year old.
Always check the date on a post before replying.
The link has expired.
Start a new post and some one will help you.
For repair flow charts on codes a factory repair manual or a All DATA sub has your best info.
http://www.alldata.com/products/diy/index.html

Good Luck
MT

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