◆

2005 Cadillac STS repairs by problem area

Engine (31%)

Transmission and Drivetrain (10%)

Brakes and Traction Control (2%)

Suspension and Steering (12%)

Electrical and Air Conditioning (22%)

Paint, Rust, Leaks, Rattles, and Trim (17%)

Other (6%)

Select a problem area

Show all problems

Need advice about a specific Cadillac STS problem?

Chart based on 134 repairs.

See TSBs and recalls for the 2005 Cadillac STS.

2005 Cadillac STS engine repair cost distribution

$2500+ (5%)

$1000 - $2499 (5%)

$500 - $999 (3%)

$100 - $499 (26%)

< $100 (61%)

See most expensive repairs

Worried about potential repair costs? An extended warranty can provide peace of mind.

Chart based on 38 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

82000 mi

catalytic converter failed.

Return to top

109000 mi	check engine light would go on for a week then off for a day or two then back on again. Catalytic converter was showing as problem on computer, it was replaced under warranty work, since others have had same issue, but there wasn't a recall
84000 mi US $400	Thermostat leak

109100 mi

US $4000

Aor leak in fuel system and a bad coil. Catalytic converter is going out.

148000 mi

CHECK ENGINE LIGHT CAME ON AND ENGINE RAN VERY ROUGH. THE PLUGS AND COIL PACKS NEEDED TO BE REPLACED. REPLACED VALVE COVER GASKETS TO SOLVE A LEAK.

43000 mi

Water pump and front timing cover replaced. Engine was leaking oil and coolant. Drivers interior door handle replaced. Chrome was flaking off. both were covered under warranty

55000 mi US $1293	Leaking heater core had to be replaced.
60000 mi US $460	Replaced water pump

48000 mi	Check engine coolant on DIC. Coolant was full. Replaced coolant resevoir.
141700 mi US $285	Check Engine light comes on every two weeks. No error code. Cause unknown.

52000 mi US $70	Service Engine light comes on intermittently. Not related to gas cap being loose. Happens about every 500-800 miles, then goes off again. Code is PO420, Converter system below threshold.
60000 mi	Fuel gauge quit after bad gas. Bought entire tank from salvage yard, which included both sending units and fuel pump. Had to remove exhaust, drive shaft, and suspension to access tank. Mass air flow sensor was cleaned to determine if it was causing SEL to come on. Oil from K&N air filter apparently was causing it. After sensor cleaned, light hasn't come back on.

53000 mi

US $168

Service engine soon light coming on. Replaced MAF sensor.

Return to top

114000 mi

US $15

MAF showing Check engine code

179800 mi C $1	GM changed both catalytic converters and exhaust manifolds assembly and oxygen sensors under a special guaranty to 200000 miles or 14 years(only 2005). Works fine since then but still check engine on :( i have to replace MAF sensor.
210180 mi	GM changed the catalytic converters on a secret warranty

61000 mi	Check Engine Light and loss of power. Catalytic Converter failed. Dealer replaced only the one that failed under 8 year emission warranty.
63000 mi US $15	Check engine light came on with code P0442. Owner replaced fuel cap with new and reset CEL.
78200 mi	Mass Air Flow Sensor came detached from air filter box. It unscrewed itself.
83900 mi	Check engine light. Reports MAF problems: P1101, P0068. Cleared codes. Code comes back periodically.
89000 mi US $60	Replaced Mass Air Flow Sensor (MAF) due to P1101 P0068 P0174. Earlier efforts to clean the MAF did not fix the problem. Bought new MAF and installed it, which also did not help. Codes returned about two weeks later. The warning light comes and goes. It usually comes on with an outdoor cold start (<40 degrees F). I've since found a TSB that says the ECM can be reprogrammed because of these codes appearing on cold starts. I won't bother with the TSB because that will be a dealer work item = expensive. In retrospect, the MAF sensor replacement was not needed. The MAF code is a misleading indicator caused by an ECU problem.

61000 mi US $100	coolant leaks, water pump
63300 mi US $200	two catalytic convertors
87000 mi US $100	P0113

51000 mi	Replaced 2 broken motor mounts.
63000 mi US $1200	I had what I thought was a water hose leak that turned out to be the water pump. I decided to have all belts and hoses replaced since the car is 5 years old and Arizona heat kills rubber and I don't want it breaking on the road.
64700 mi	Bad intake camshaft position sensor, required engine teardown
66000 mi	Mass Airflow Sensor Replacement - They needed to order some parts so it took an extra day, but they gave me a loaner car, so I am fine with that.

32240 mi

Check Engine light came on: catalyst converter not working. Ordered new one under warranty. The problem went away very soon which was the reason I could not replace the converter earlier when both got damaged by poor premium grade gasoline quality.

44000 mi	Had transmission software updated.
65000 mi US $148	I took car in for a CEL and oil change. Dealer said cats needed to be replaced and the right motor mount was bad. Dealer had to order parts. had cats replaced and a left motor mount replaced and now told my transfer case needed repair.

Return to top

97000 mi

US $2500

Catalytic converter on the right side clogged up.. resulting in the right side of the motor heating up and losing compression..Engine Change..was cheaper than a tear down...