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PostPosted: Tue May 14, 2019 11:35 pm 
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Joined: Tue Apr 16, 2019 9:23 pm
Posts: 12
Car Model: 9-5 HOT
Finally pulled the code for the CEL, P01420, which I've come to learn might not be straight forward. I know it's related to an 02 sensor, but I've also been informed I may need to perform a j16 splice fix?

Firstly, no idea what that means and I'm not good with wiring at all. Is there anyone handy to Leicester that would be willing to do this?


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PostPosted: Wed May 15, 2019 6:37 am 
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Barrelling Along
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Joined: Fri Nov 23, 2007 6:13 pm
Posts: 20145
Location: Maidstone
Car Model: 9-5 Aero
Mach wrote:
but I've also been informed I may need to perform a j16 splice fix?


Come again?
What's one of those when it's at home?
Who was it that informed you?
Was the code from a generic code reader or TechII?

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Power is nothing without control


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PostPosted: Wed May 15, 2019 6:51 am 
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UKS Addict
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Joined: Thu Feb 14, 2008 10:47 am
Posts: 6650
Location: Queenborough, Kent
Car Model: 9k, 9-5 Aero & a Jaaag
WIS doesn't even list that code for a 2002 model year 9-5 ... all powertrain codes listed are 4 digits long, eg P1106, there is no P1420 code.

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PostPosted: Wed May 15, 2019 7:28 am 
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Joined: Thu Sep 01, 2005 5:31 am
Posts: 4735
Location: Bucks
Car Model: Saab NG 9-5 Aero
A splice is a joint usually a crimped connection where one wire joins one, or more, other wires. J16 identifies which splice it is. Unless you have the correct tools, don't disturb splices.


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PostPosted: Wed May 15, 2019 7:44 am 
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Joined: Tue Apr 16, 2019 9:23 pm
Posts: 12
Car Model: 9-5 HOT
Saab owners club, Facebook based page.

Apologies on the code, I added a 1, its p0420


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PostPosted: Wed May 15, 2019 7:44 am 
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Joined: Tue Apr 16, 2019 9:23 pm
Posts: 12
Car Model: 9-5 HOT
Saab owners club, Facebook based page.

Apologies on the code, I added a 1, its p0420


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PostPosted: Wed May 15, 2019 10:06 am 
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Joined: Tue Feb 10, 2015 8:13 pm
Posts: 2214
Location: Peterborough UK
Car Model: 9-5 Aero 2001,1.9TID x 2
P0402 is a problem with the catalytic converter itself the 02 sensors or wiring.
How was the fault diagnosed?
http://www.saabnet.com/tsn/bb/9-5/index.html?bID=215618


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PostPosted: Wed May 15, 2019 7:39 pm 
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Joined: Tue Apr 16, 2019 9:23 pm
Posts: 12
Car Model: 9-5 HOT
I purchased a plug in reader and I used torque pro app


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PostPosted: Wed May 15, 2019 10:11 pm 
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Joined: Tue Feb 10, 2015 8:13 pm
Posts: 2214
Location: Peterborough UK
Car Model: 9-5 Aero 2001,1.9TID x 2
First checking the wiring continuity to the sensors and the possible break at J16 is likely the cheapest option to try first.
After that you are spending money on the rear sensor replacement and ultimately a new CAT.
I assume you dont have any vacuum leaks and the car isnt running too rich for some reason?
https://www.saabcentral.com/forums/show ... p?t=224608


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PostPosted: Thu May 16, 2019 4:29 pm 
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Joined: Tue Apr 16, 2019 9:23 pm
Posts: 12
Car Model: 9-5 HOT
As far as I am aware there are no air leaks but I'm planning to replace the lines asap. I'm not electrically minded so this is all beyond me.


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