Cadillac DeVille Problem Report
Cadillac DeVille Check Engine Light due to EGR control solenoid/valve failure
didn't have a check engine light nor a service soon light, but car did start to run rough at start up, but once warm it ran fine. Checked codes and got E-48, E-49 and E-52. Checked the throttle body and cleaned it.Checked EGR valve and found out it was good and that one of the hoses was cracked. Replaced all little hoses and cleared codes. Car started to improve...acceleration and idle. No codes have appeared since then, but it would be in the best interest of the car to just replace the EGR valve and check all hoses to make sure you don't have a vacuum leak. - cityilu5
Check engine light on. Replaced the EGR valve. - Visitor
The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.
- had a complete tune up and the gas filter replaced, but she keeps sounding like she's going t...
check engine light is on trouble code #1860.
Failure of the catalytic converter can result in illumination of the Check Engine Light.