Why does the check engine light in my STS turn on when I start my car?

It’s usually normal for your check engine light to turn on upon ignition. This is just your STS testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why is my Cadillac STS making engine noise?

Unusual noises can signal a problem with your Cadillac STS engine. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage a Cadillac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Cadillac STS engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I add water to my Cadillac STS radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your STS when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What could cause my STS engine to suddenly stop?

Reasons your STS car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who can repair my Cadillac STS engine?

For Cadillac STS engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

Engine Repairs for Your 2005 Cadillac STS

Learn about

2005 Cadillac STS Trim Options

Select your Cadillac STS trim level to learn more about Cadillac-recommended engine repair. Use the following chart to find information.

V6/3.6L

V8/4.6L

Repairs for Your 2005 Cadillac STS

Nothing stays the same forever. Even your Cadillac STS's many parts and pieces. When something breaks or fails, we’re ready to help. Click on a repair below to learn more about 2005 Cadillac STS repairs.

We’re Trained to Care for Cadillac STS Engines

Cadillac STS drivers trust that their STS will take them near and far. That might be why you bought it in the first place. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. If the unexpected strikes, you may search the internet frantically for quick and affordable 2005 Cadillac STS engine repairs. That’s where Firestone Complete Auto Care comes in. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Cadillac STS engine will be in good hands. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 2005 Cadillac STS Check Engine Light Is On

If your STS check engine light is on, it’s time to get it looked at. A check engine light that’s flashing or steadily illuminated could point to problems with your or emission control system that won’t go away on its own. Possible causes can include a failing oxygen sensor, worn spark plug, issues with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your STS to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. engine rattling, essential fluid leaks, or engine misfiring.

Engine Repairs for Your 2005 STS

If your 2005 Cadillac STS needs engine repair, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 2005 STS engine repairs and you can drive easy knowing that we use Cadillac-approved parts and fluids — timing belt, valve guide seal, fuses, or a different component.

Engine Q&A 2005 Cadillac STS

Why does the check engine light in my STS turn on when I start my car? It’s usually normal for your check engine light to turn on upon ignition. This is just your STS testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why is my Cadillac STS making engine noise? Unusual noises can signal a problem with your Cadillac STS engine. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage a Cadillac engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Cadillac STS engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I add water to my Cadillac STS radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your STS when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What could cause my STS engine to suddenly stop? Reasons your STS car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who can repair my Cadillac STS engine? For Cadillac STS engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.