Check Engine Light and/or Erratic Engine Idle on Cadillac Catera

Problem Description and Possible Solution

Engine vacuum leaks may develop from the various vacuum hoses causing the engine to idle incorrectly or the Check Engine Light to illuminate. Damaged vacuum lines should be replaced as necessary. Our technicians tell us that rubber vacuum hoses can be used to replace damaged plastic lines if necessary, as long as any connections are vacuum tight.

Problem Data
RepairPal Verified
Average mileage: 104,777 (43,000–140,000)
Engine affected: 3.0L V6
5 model years affected: 1997, 1998, 1999, 2000, more2001
15 people reported this problem
Viewing 1 - 4 of 4 comments
I noticed that the vacuum lines up by the Brake Booster was broken. I tried reconnecting it, with no luck of it being vacuum tight. Shortly after my CEL came on, and is still on. I am currently working to fix the issue.
Engine light came on and states on all the time car runs so fine no missing and starts good had car checked and I t showed to have ancient leak