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

Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why does my Cadillac engine sound different?

Strange engine sounds can be a sign something’s off in your Cadillac STS. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage my Cadillac STS engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. 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?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What could cause my STS engine to suddenly stop?

If your STS car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who repairs Cadillac STS engines?

Your local Firestone Complete Auto Care has you covered with expert STS engine repair. Schedule an appointment today and see us at one of our thousands of locations.

Reliable Repairs for 2006 Cadillac STS Engines

Learn about

2006 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

V8/4.4L

V8/4.6L

2006 Cadillac STS Repair

Nothing lasts forever. Even your Cadillac STS's many parts and pieces. We’re here to help when something stops working. Click on a repair below to learn more about 2006 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. You probably thought about that when you got it. However, even your trustworthy engine is subject to wear and tear. Sometimes plans go sideways. When they do, you might find yourself searching for 2006 Cadillac STS engine repair or replacement parts. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. We've serviced more than 500 million vehicles since 1926, and our technicians know Cadillac STS engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 2006 Cadillac STS

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 car’s starter, Possible causes can include a failing oxygen sensor, worn spark plug, a clogged catalytic converter, or an engine vacuum leak, to name a few possible causes. Bring your STS in for an on-board diagnostic check and our expert techs will get the root of the problem. Other signs it's time for Cadillac STS engine service might include burning smells, or misfiring.

Cadillac STS Engine Repair

If your 2006 STS engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. We'll also tell you if it's necessary for your safety. We want to give you all the details you need to make an informed decision about your engine repairs. By choosing Firestone Complete Auto Care for STS engine repairs and you can feel confident knowing that we use Cadillac-approved parts and components like the timing chain or belt, valve guide seal, sensors, or other parts.

Engine Q&A 2006 Cadillac STS

Why does the check engine light in my STS turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is a sign that your vehicle is testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why does my Cadillac engine sound different? Strange engine sounds can be a sign something’s off in your Cadillac STS. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage my Cadillac STS engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. 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? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What could cause my STS engine to suddenly stop? If your STS car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who repairs Cadillac STS engines? Your local Firestone Complete Auto Care has you covered with expert STS engine repair. Schedule an appointment today and see us at one of our thousands of locations.