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Some Saabs were equipped with a temp sensor in the catylatic converter. If the cat converter got too hot, the EXH alarm on the instrument cluster would light. I don't remember how hot it needed to be, but it was hot! When it cooled off a little (10-15 degrees Celcius) the alarm would go away... Ron
 

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Discussion Starter · #6 ·
stupid question,but needs to be asked! If the sensor stopped working, would this have an effect on the general performance?
 

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Yes and no
If the car was running poorly(incomplete combustion), the catatlytic converter would be stressed - which is not good and its costly. Otherwise, this sensor would have no effect.. It seems like a good idea, maybe...
 

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Is the light on when you first start the car and the cat is cold?

If so, the sensor is probably defective, but I don't know anything about this sensor, whether it can be replaced or if the cat needs replacement to change it.
 

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We don't have that sensor in the US. I'd try looking at it first. Maybe the cable got melted by the heat and there is a short-to-ground in the circuit now... Ron
 

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OP> If you are talking about the 9000 in your profile you are in the wrong forum area... try the 9000 forum for better responses (this is for NG900 and 9-3).

If it is anything like the older classic 900 the EXH light would come on when it is time to replace the o2 sensor.

Try the 9000 forum area tho!

sab
 
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