Hi Folks, just a qq: my CEL has been lit for a few weeks now (code 71 EGR). I have not yet fixed the egr but if I reset the cel by unhooking battery cable, the light will turn off but inevitably come back on after a few miles (as expected).
however, today I noticed the cel was off when I started the truck but I did not remove battery cable prior. My question is: will the cel automatically turn off if the issue is not detected? My understanding was that once the computer trips the CEL, it will stay on until the ecu is reset (power/fuse pulled), even if the underlying issue (egr) is fixed. Hence, trying to understand why the light would now be off.
thanks!
however, today I noticed the cel was off when I started the truck but I did not remove battery cable prior. My question is: will the cel automatically turn off if the issue is not detected? My understanding was that once the computer trips the CEL, it will stay on until the ecu is reset (power/fuse pulled), even if the underlying issue (egr) is fixed. Hence, trying to understand why the light would now be off.
thanks!