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Hi all , having some issues with my Saab 9-3 convertible ( 2002 ) 2.0 turbo.

The check engine light has come on and the car is really down on power, more so in higher revs 3000K + there is hardly any power, it is struggling to go over 80 mph. The fuel consumption is showing 24 mpg :eek:

I have gone over the engine with a fine tooth comb and cant find any hoses detacted or split, the engine sounds lovely even when rev`d hard

this evening I run a scan of the ECU and its showing error:

P1105 ( GM ) Secondary Vacuum Sensor Circuit

I`d be really grateful for any idea`s

thanks Lee
 

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Did some Googling and found this:

"P1105 indicates that the secondary vacuum sensor circuit should be checked. Low vacuum can lead to poor engine performance as a result of restricted airflow. Other P1100 codes can involve the throttle system, coolant, intake air temperature and fuel system errors. Any P1100 code involves engine components outside the engine block"

Found this older thread which might help:
http://www.saabcentral.com/forums/showthread.php?t=90707
 
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