Here is a handy gadget that I bought for my husband at my husband's request. My husband uses it to diagnose the system in our car to find out in advance what problems may arise. So far this device has helped with our car engine and car battery problems. We saved a lot of money because we knew quick fixes in advance, for example when we just needed to change our car battery. I find this unit easy to read and some diagnostics are quick. I also try to keep it in the trunk of my car for emergencies.
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