Date registered: Jan 2012
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Thanks for the info. What I had in mind was something that would be useful in my household where we have one M.B., one Volvo and one VW. I'm not trying to diagnose problems with things like the A/C, rather just get a handle on the issues that throw out "Check Engine" alerts. I've kind of sorted out that if you can look at things like the MAP sensor output in real time and the readings go up and down at the appropriate times, the problem is probably not the MAP sensor but something else causing the sensor to fault. Similarly, if it's flat-lined, you either have a bad sensor or a vacuum break.
I was looking for some sort of a scanner tool that would allow me to check the basic engine functions, in real time. Not just check which codes have been thrown. Hopefully it would be inexpensive enough that it will pay for itself, if I can avoid one trip to the shop by using it.