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2006 Cadillac STS engine problems

28 complaints (20% of all complaints for this car). Typical mileage when it fails: 78,142. 4 crashes reported.

owner complaints
28
of this car's complaints
20%
typical mileage
78,142
crashes
4
recalls
0

Which part fails

  • Exhaust system: emission control: catalytic convertor
    1
  • Engine
    1
  • Cooling system
    1

At what mileage

Complaints by mileage at the time of the problem.

0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+

Cadillac STS engine problems in other years

19992000200120022003200420052006200720082009

Specific symptoms reported on the 2006 Cadillac STS engine

Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.

Stalling 17Check engine light 7Loss of power 5

Related recalls

No recalls on record for this model year.

What 2006 Cadillac STS owners say

Most recent owner complaints, unedited.

Filed Aug 2, 2020 · Electrical, Engine · 56,000 miles · NY

While driving, the entire panel goes "off" shutting down the car completely. The panel board is completely dark, no electric supply, no gas supply.

Filed Feb 27, 2019 · Engine, Transmission · 100,000 miles · MA

Tl* the contact owns a 2006 cadillac sts. While driving various speeds, the vehicle hesitated and sputtered. The vehicle was taken to an independent mechanic who diagnosed that the catalytic converter was faulty and needed to be replaced. While the vehicle was being serviced, the mechanic discovered that the rear tow differential was faulty. The vehicle was not repaired. Woodworth cadillac (339 n. Main street, andover, ma) and the manufacturer were notified of the failures. The failure mileage was 100,000.

Filed Feb 25, 2019 · Engine, Suspension · MA

Purchased 2006 cadillac sts built on june 21 2005 last day of 2005 model. Car has had all the issues that 22005 vehicle had. June 23rd 2005 was first day of production. At every corner VIN # are noted however for this model the build days which noted by cadillac are the important factors. I don't think coincidence that I've been companling to cadillacand asking for help with zero help. Catalytic converter was extended warrantee for 200000 and 12 years however cadillac always says VIN even though dates are the only thing noted. I have called and e,ail for 3 years. My car is off road and they have refused to look and even if I paid they wouldn't guarantee they would even look at the issues. My car is in absolute limbo neither a 2006 or 05 or whatever. They have refused every step even though it was based on recalls

Filed Jul 1, 2017 · Engine · 83,000 miles · CA

On thursday 18 may 2017, while driving north on interstate 405 in heavy traffic at normal speeds, the engine began to miss out; and the brakes lost power assist. The problems persisted and worsened, so I exited the freeway to surface streets and began the trip back south on interstate 405 to take the vehicle to the dealer for diagnosis and repair. When stopped on surface streets (and on the freeway), it was necessary to shift to neutral and add fuel to the engine to keep it running. Also, it was necessary to apply extra strong pressure on the brake pedal because of the lack of power assist. After arriving at the dealer and shutting off the engine, the mechanic could not get the engine to restart. After extensive exposure of engine internal parts, dealer diagnosis was that a rocker arm had broken at one of the cylinders, resulting in debris falling through the valve opening into the cylinder and scoring the valve seat and the piston. The dealer recommended replacing the engine. -- at that time, the vehicle had accumulated 83,000 miles of moderate driving, and was only a little over 11 years old. The vehicle was purchased new from the dealer in december 2005, and had been maintained exclusively by that dealer since the vehicle was purchased. Subsequently, a new (remanufactured) engine was purchased from and installed by the dealer at a cost of $12,678.25. The vehicle was with the dealer for a total of six weeks to complete the repair and installation. -- clearly, had the engine completely failed while driving on the freeway, intensive action would have been required to safely exit the freeway and to bring the vehicle to a stop (especially because of loss of power assist on the brakes). This would have placed my passengers in very high danger and personal risk.

Filed May 17, 2016 · Electrical, Engine · 60,000 miles · MA

Tl* the contact owns a 2006 cadillac sts. The contact stated that the vehicle experienced an abnormal noise from the engine compartment. The vehicle was taken to an independent mechanic where it was diagnosed that the timing chain was defective and needed to be replaced. The vehicle was repaired. The vehicle also experienced a loss of power. The vehicle was able to be restarted after being shifted into neutral. The vehicle was taken to the dealer where it was diagnosed that the auto start was defective and needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was notified of the failure. The failure mileage was approximately 60,000.

Filed Feb 9, 2016 · Engine, Transmission · 120,000 miles · OH

Tl* the contact owns a 2006 cadillac sts. The contact stated that while driving at approximately 55 MPH, a strong burning odor emitted inside of the vehicle. In addition, drops of oil were visible on the ground. The vehicle was taken to the dealer where it was diagnosed that the front passenger's side axle seal fractured. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 120,000. .....updated 03/15/16 *bf updated 03/17/16.

Filed Feb 1, 2016 · Engine, Suspension · MA

Hello, I purchased a 2006 sts v8 last january. Since then I have had to replace all four tires immediately, a starter, and the brakes and then replace front brake pads again. I recently went to auto shop and was told catalytic converter and suspension need to be replaced. After investigation I realized there was recalls on the 2005 sts v8 model for the brakes, suspension and the catalytic converter has an extended warranty of 12 years and 200000 miles. The fact is that further investigation showed my car was built in 2005 and the actual manufacture date on vehical was 6/20/2005 which was last date of production for the 05 model. The 2006 manufacture or build date began on 6/23/05. It seems odd all the recalls for the 05 model are all the year old vehicle are faced with. I called cadillac and they said although the build date of vehicle is valid the VIN number is what is followed. However, further research shows they actually found the same recall on the 05 catalytic converter on a 2007 cadillac. Everything points to the fact that the my 2006 model was actually either a late model of a 2005 by the build date of 6/20/05 and or the same parts have been used as the 2005 recall. Lastly the VIN number when I pulled up on a site showed it was actually a cts model. I have spent a lot of time and have a great deal of data I could share that would back that my 2006 sts v8 actually is part of the recall cars. I understand the VIN number is what is looked at but when model year cars are being made and sold as different years than when they are produced and recalls effect the year of actual build this becomes very concerning. As in the past year I will be spending over 3000$ plus dollars to fix this car. I.hope you can look into. As they wont even investigate or give me the serial numbers for the parts being recalled

Filed Nov 9, 2015 · Engine · TN

The car spark plugs keep going out and the car is make a clicking noise it is silender 1 and 3.

Filed Oct 21, 2015 · Electrical, Engine · 160,000 miles · TX · fire

The car went in flames by itself while turned on.

Filed Sep 10, 2015 · Electrical, Engine · 133,000 miles · MA

This problem started over a year ago and I have had it to the dealer twice and they can no find the problem because there are no codes in the car. While driving the car it shuts down and you lose everthing lights, turn singles, hazards,the dash goes totaly out and the engine stops the best you can do it to pull it over to the side of the road and hope you don't get hit. I have had this happen it town driving and on the highway so it has nothing to do with speed. I have loaned my car to other people and it has happened to them so it is not the driver. I will happen and you pull over put the car in park and it starts right up and you can continue driving and it may happen a mile up the road or it may not happen for a week or a month later and still no codes.

Questions about the 2006 Cadillac STS engine

Does the 2006 Cadillac STS have engine problems?

Owners have filed 28 complaints about the engine of the 2006 Cadillac STS, 20% of all its complaints.

At what mileage do 2006 Cadillac STS engine problems start?

The typical (median) mileage in owner complaints is 78,142 miles.

Was there a recall on the 2006 Cadillac STS engine?

There is no recall for this problem on this model year.

What year does the Cadillac STS have bad engine?

The Cadillac STS model years with the most engine complaints are 2006 (28 complaints), 2005 (19 complaints) and 2008 (11 complaints).

Other 2006 Cadillac STS problems

Airbags 57Electrical 21Fuel system 20Transmission 13Driver assistance 9Acceleration 6Seats 6Brakes 5Steering 5Seat belts 4Locks 3Suspension 3Tires 2Body 1Wheels 1

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