Close
Cadillac
Seville SLS
19

Check Engine Light Due to Intake Manifold Vacuum Leaks on Cadillac Seville SLS

Problem Description and Possible Solution

An intake manifold vacuum leak can develop from a variety of sources, often causing illumination of the Check Engine Light with codes P0171 & P0174 stored. Thorough diagnoses will be necessary to pinpoint the cause in order to make the correct repairs. A "smoke" machine is often used to isolate the cause of difficult to find vacuum leaks.

Problem Data
RepairPal Verified
Average mileage: 111,600 (59,000–143,000)
11 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002, 2003, 2004
19 people reported this problem
Comments
Viewing 1 - 3 of 3 comments
intake boot cracked due to bad front motor mounts
Found a hose was not plugged in, plugged it back in. Error code went away in about 10 seconds.
P0101, P0300, P0131, P0171, P0174