Check engine light comes on after car gets warm?
It just started after I blew the inlet hose to the heater core and replaced it, I'm not sure if this is what caused it, but I pulled codes and only the 34 code came up in the KOEO and continuous memory tests. With the KEOR test the 34 and the 91 codes came up. I know the 34 code is for the EGR and the 91 is for the O2 sensor, so is my O2 bad and causing the CE light to come on after it warms up?
1993 Bright Calypso Green LX