How long for SES light to come on?
How long do I have to wait after replacing an oxygen sensor on a 2003 Chevy S10 to see if the service engine soon light will come back on? I had an SES light and PO135 code, malfunction in oxygen sensor heater circuit. SES light was off after replacing oxygen sensor, but I figure that's because computer was disconnected (unhooked positive battery cable in accordance with installation instructions). I have driven it five or six cycles to fully warm, at least once after the exhaust system had totally cooled off (but not coolant), and no light, but not sure I can call it good yet.