CEL on then off

d7es3l · Mar 15, 2013

Yesterday, I started my truck after 2 days, the weather was fairly warm (50°). After I started it, the CEL was on, it was idling fine. About 7 seconds later, the engine dropped 200 rpm, the CEL went away & it returned to normal idle... Any ideas? ICP? HPOP? Or did I get lucky & get a truck that fixes itself? This hasn't happened before & it didn't log any codes. Thanks for any input!

Redpower · Mar 15, 2013

Mine did something like that this winter when it was really cold. Hasn't came on since then. Believe in the magic...

Zmann · Mar 15, 2013

if a CEL was set you would expect it to store the code for a few drive cycles

d7es3l · Mar 15, 2013

Zmann said:
if a CEL was set you would expect it to store the code for a few drive cycles

For some codes to store, does it have to log it for a minimum amount of time?

d7es3l · Mar 15, 2013

Redpower said:
Mine did something like that this winter when it was really cold. Hasn't came on since then. Believe in the magic...

I believe! Haha. I am not going to worry about it thanks!

Zmann · Mar 15, 2013

I think as long as the CEL was set that's all it would take to create the stored code

not sure what your reading with but some codes are only retrievable with a Higher end
devices

fingers crossed LOL

d7es3l · Mar 15, 2013

Zmann said:
I think as long as the CEL was set that's all it would take to create the stored code

not sure what your reading with but some codes are only retrievable with a Higher end
devices

fingers crossed LOL

Ya unfortunately I couldn't get my hands on an auto enginuity... But the one I did use, it still could access basic ECM info & it said I didn't have any codes, I have a 2 hour drive today, I guess we will see how she does!