Originally Posted by
zip439
You should also get the Diagnostic Trouble Codes read with an OBDII reader. It is a free service at most auto parts stores or you could purchase an inexpensive one. A lot of people on the forum have "UltraGauge" which we travel with. smaller than a pack of cigarettes, so easily fits in the glove compartment.
I use the ultragauge and keep it plugged in permanently, affixed to the windshield in the lower left. Unobtrusive and always ready. It also can display many parameters of the cars operating condition.