Cadillac DeVille Problems

Check Engine Light Due to Engine Vacuum leak on Cadillac DeVille

Problem Description and Possible Solution

The Check Engine Light may illuminate due to an engine vacuum leak from the intake manifold area.

(48 people reported this problem)

Cadillac DeVille Vehicles With This Problem

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Average mileage: 96,938 (6,435–165,000)
6 model years affected: 2000, 2001, 2002, 2003, more2004, 2005
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Viewing 1-20 of 20 comments
i have a vaccum leak between air intake and throttle body after getting my starter replaced
with the intake manifold cover removed you can hear the high pitched sound from the vaccum leak coming under neath the intake manifold. relaced intake gasket and other rubber hoses.
vacuum leak to the right side of the intake manifold spraying starter fluid in the area causes a engine to rev up has very rough idling service engine soon light came on about a week later
A sharp employee at Advance Auto when asked to read code took carb cleaner and sprayed around the passenger side of intake manifold. This caused the engine RPM's to increase. Remove the engine cover. A short vacuum rubber hose connection was replaced to fix the problem.
Car was missing terribly. Check engine light on. Poor gas mileage. Mechanic replaced the gasket connecting the plenum. He said these cars were common for this problem. He charged me $200.00 including the cost of the part which was $34.00. The first garage diagnosed that I needed the plenum replaced and wanted $750 -$800.00. Watch out for this and get a second opinion. I`m glad I did.
Rough idle and check engine light caused by vacuum leak in rubber pentium between TB and intake manifold.
Repair cost $420
intake vacuum leak at the rubber boot connecting the plenum. Sprayed carb cleaner on it and engine revs up and runs smooth and I hear the vacuum noise of the spray being sucked in. One month ago heard a high pitched whistle when idling. Has since gone away.
engine ran rough..had it checked out and it had leak from intake were cheap , however, the labor was expensive to have it fixed.
The Check Engine Light illuminates due to an engine vacuum leak from the intake manifold area.
Had a p0171 and p0174 saying engine bank one and bank two too lean. Caused by leak in engine intake manifold. Repaired, check engine light went away.
Code, revving of engine, hissing noise. replaced boot connected to intake manifold, small tear underneath.
garage charged $345.00 to replace the vacuum hose. The replacement 90 degree T broke in less than 100 miles
SES light on steady. Diagnosed small vacuum leak at plenum; repaired for under $100 parts and labor by dealer in Williston, ND. Engine ran fine with the light on but was a little too lean, therefore the SES light went on when the system threw a code. No other hard or soft codes present; engine runs strongly as when new with 25 mpg avg. at 65 mph o high plains rural highways. Only problem ever had with this car or this engine.
Honest small town local dealer; not like the thieves in LA and Phoenix and Palm Springs where I have lived before.
Car surging accelerating on its own. Codes lead me two cleaning MAF sensor and replacing crank sensors. Car still idles rough when hot surging between 750 and 625 rpm. Found leak in gasket on both sides of throttle body connector and sealed with RTV much better. Ordered new plenum connector $21.
i have a vacuum leak only when engine is hot also hear a like whistle check and replaced vacuum holes could the intake be cracked.