I have a 1995 Chevrolet Impala SS with a 5.7 V8. It has no driveability problems, but the cel is on. Using my OTC Monitor, I pulled these 16 codes:11,12,13,14,15,16,18,19,21,22,23,24,25,26,27,29. Tried to erase them with the scan tool, no luck. Disconnected th... Login to read more.