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

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.

RepairPal Verified
Average mileage: 103,907 (43,000–140,000)
Engine affected: 3.0L V6
5 model years affected: 1997, 1998, 1999, 2000, more2001
12 people reported this problem
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Viewing 1 - 4 of 4 problem details
BAD WATER PUMP? NOISY IDLE? STEAM IN EXHAUST CONSISTENT. LEAKING INTAKE GASKET? BAD IDLE PULLEY. OVER ENGINEERED ENGINE DESIGN. MONEY MAKER FOR MECHANICS.
1998 Cadillac Catera - 3.0L V6 140,000 mi,
Not fix yet
2001 Cadillac Catera - 3.0L V6 90,000 mi,
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.
1997 Cadillac Catera - 3.0L V6 108,000 mi,
I have the same problem. No solution. Looking for one like you :)