The Best 2001 Chevy Truck Check Engine Light Ideas. Your car checks all of the systems as you drive and when the emissions systems are not fully ready, the light will flash and then eventually stop after several driving cycles. A check engine light can indicate a broad spectrum of problems with your 2001 chevrolet express 1500.
A wide array of issues can cause a check engine light to. Disconnect the knock sensor pigtail harness on the back of the intake and check for 100k ohms resistance to ground on both sensors. P0446 evaporative emmission control system vent control circuit.
