Hello All. Our '97 900SE failed it's emissions inspection; specifically, the code for a faulty cam-shaft sensor was read (gas cap passed and ppm NOX passed). After the local independent Saab specialist re-set the codes/computers, the Check Engine light stayed "off" for about 20 miles... Question: Is the next most logical fix a new Direct Ignition Cassette? And while I understand it's a quick/easy replacement for most DIYers, what about re-setting the codes for the next inspection? Any other possible ideas/repairs needed? Thanks in advance,
Emissions & DIC
Sep 22, 2006
6 Replies
Ummm... why wouldn't you try the camshaft sensor first?
specifically,
Good point. I think the mechanic already checked it; hence his suggestion about the DIC. Also if it helps, the spark plugs were changed 3000 miles ago at 93K miles for the 90K/95K service.
Based on MRFWU theory (Most Recently Fiddled With Unit) one of the plugs could be bum.
There is no camshaft position sensor on the engine. The DIC does the sensing through some process I've never quite understood. So, if you get that code, it is either the DIC or the plugs.
If you used the stock NGK plugs, then it is possibly the DIC. If you used some other plugs, change them to the right one. The DIC is a 10 minute DIY job - the torx driver is in the trunk.
You do not have to rest the computer, it will reset itself. In fact, in some states you can fail for have a computer that was reset too recently.
Thanks Bob (Fred too); the plugs were stock... Looks like its time for eBay for a DIC!
FYI - there is a *crankshaft* position sender - make sure you did not mean that.
DIC's commonly wear out at an average of 70K miles. DIC systems are typically short lives on most all cars that have them.
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