[bsj2002]

Hello first post here.

I have a saab 9-3 1.8t hirsch 2007, which has a power issue.
When driving randomly they car wont boost. in 1 gear it takes around 10 sec. to reach max rpm and at accelerates very slow.
The same applies to other gears aswell. If i run the car through a ignition cycle while driving or idle the car works fine.
The issue then persist 5-35 minutes afterwards.

I got some error codes P0101 and P0420

I have tried replacing the bpc valve (diden't do anything)
I replaced the MAF, that "worked" for about 2 hours, now it's back to the same issue.

I have no idea where to start.
Any answers would be helpful

 

[aerojon]

P0101 can be caused by secondary/unmetered air entering the intake side check ALL pipie work on the intake inc IC pipes..P0420 is cat efficiency below threshold,could also be the rear oxygen sensor..

 

[bsj2002]

Which one contributes to the lost power. And why does it work after an ignition cycle?

I new to these cars, do you have a diagram where I can see all the pipe work. The car gas been fitted with some do88 hoses.

 

[Mimmi]

Hi and welcome.
Both.
T8 continue with secondary sensors but reduces power.

 

[bsj2002]

Hi and welcome.
Both.
T8 continue with secondary sensors but reduces power.

So which sensors would my problem relate to.

Could it just be the O2 sensors.
The car can be left in idle for 20 minutes and then suddenly it will have no power, so it is not only when acceleration happens.

 

[jackden0427]

That can be the cause


Sent from my iPhone using Tapatalk

 

[bsj2002]

Can it be anything else, I have just ordered a o2 sensor to replacement.

 

[bsj2002]

So just so im sure, it is the rear o2 sensor. Why not the one before the cat?

 

[Mimmi]

Front.

 

[bsj2002]

Front.

Okay i replaced the front one yesterday. No results, the issue is still there.

 

[Mimmi]

P0101 (00) is MAF issue.

http://z90.pl/saab/dtc/read.php?model=9440&doc=IDA911