Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, 04 SRX with check engine light on!!! in Cadillac SRX Forums; I have a 04 SRX with a 3.6L V6 that the check engine light keeps coming on. Check codes and ...
I have a 04 SRX with a 3.6L V6 that the check engine light keeps coming on. Check codes and code # P0443 (EVAP Purge Solenoid Control Circuit Fault) keeps coming back. Code is intermittent, and when I test both the part and wiring they test okay. I got tired of playing with it so I figured that I will just replace the solenoid. Well that didnt do a thing, so now im back to square one. Not sure if it is a computer issue of something else. Has anyone had this issue as well and if so what fixed it?
Thank you,I tryed that but was not succesfull. This last time I checked it though it seem as it is now a hard code because now as soon as I clear the code it comes right back in the DTC history. Running more test now on the computer, will let you guys know.
Try these tests-
1.Key on, should have 12 V @pk/bk wire. If not, jump to 12V. Measure V @dk-gn/wt wire to ECM case. Look for 2.6-4.6V.
2. test lamp between pk/bk wire and ECM case. Should light.
3. Disconnect the ECM (ign off) and test for open circuit in gn/wt wire.
Tried all three test plus the flow chart from GM on shopkey. All signs point to the computer. Its a friends car actually so hes going to try the dealership maybe they will be able to do more, feel like I hit a dead end. Also disconnecting the battery wont help because it is a hard code and as soon as you clear it, it comes right back on.
Just a side note this last few tests there also was another hard code, it was P2008 something about the intake manifold runner solenoid. I noticed in the wiring diagrams that they share the pink/black wire meeting at splice #114 but when I tested that wire it came back good so not to sure about that either.
I know this is going to sound really simple but did you check the gas cap to make sure it is properly closed. It has something to do with the emmissions according to the manual. I have had this same problem numerous times and it was always the gas cap. Once you close the gas cap it may take a few hours before it clears. Hope that helps.