HT4100 4.1, 4.5, 4.9 Discussion, Code e048 what's the trigger? in Cadillac Engine Technical Discussion; '92 Eldorado 4.9.
I'm getting an intermittent code e048 (egr system problem). I've read through a few posts related to ...
'92 Eldorado 4.9.
I'm getting an intermittent code e048 (egr system problem). I've read through a few posts related to this and some possible solutions which I'll try, but I'm curious as to what actually triggers the code? Is there a sensor somewhere that measures flow through the EGR system, or is the PCM just looking at the resistance through the coil in the EGR solenoid to determine if the solenoid is functioning properly? If it's just checking the solenoid, what should the resistance be? I'd like to throw a DVOM on it to make sure the solenoid isn't on it's way out.