Hey well when my car is cold and I start it the check engine is not on. But after ~ 7 minutes of driving the CEL pops up. Im thinking something OX sensor related But I didnt get any codes last time I checked. COuld it be due to something in the temp sensor? Because it seems my car temp. will be half way then the CEL will come on, then you can watch it rise up from 1/2 to 3/4 temp. reading.
#122242, "RE: Check Engine: Only when warm?" In response to Reply # 1
Nope, No leaks. No holes. Res. for Radiator is still on full after 3 months...its not leaking for sure. And I dont think its running hot, I think its something with a temp Sensor.