My father, an electrician, drives a 1998 Chevy Express 1 ton. It started sputtering on the way to work about a week ago, and on the way home we were barely able to coast into a PepBoys. It's still there, and they've run a diagnostic test. The codes they gave us are (and sorry if some dont make sense. They are hand-written and hard to decipher): P0102-Mass AVFlow Circuit Signal Low P0121-TP Sensor App Sensor Problem P0327-Knock Sensor Signal Shorted/Low P0340-Camshaft Position Sensor Problem P0463-Fuel Level Sensor Ckt Signal High/Open P1345-CKP/CMP Correlation Problem
The service engine light has been on for quite a while, so it is hard to say which of these problems are recent and which ones have been around before the van broke down. My question is, which of these problems are serious and could cause a van to lose power, sputter, and even stall out sometimes? My guess from reading these forums is that the CKP/CMP correlation problem is the most serious. Any suggestions? Oh, and one more thing...it has been raining REALLY hard around here recently. I doubt that is relevent, but its worth mentioning. Thanks a lot.