Why does my Bonneville’s check engine light come on when I start it?

Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your Bonneville firing up its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are Pontiac Bonneville engine noises bad?

Strange under-the-hood noises can point to problems within your Pontiac Bonneville engine. 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 might be a sign of brake problems rather than engine issues.

What could damage my Pontiac Bonneville engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I use water in my Pontiac Bonneville 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 can cause a Bonneville engine to suddenly stop?

Your Bonneville car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Where can I go for Pontiac Bonneville repair?

Your local Firestone Complete Auto Care offers Pontiac Bonneville engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 2004 Pontiac Bonneville

Learn about

2004 Pontiac Bonneville Trim Options

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

V6/3.8L

V8/4.6L

Pontiac Bonneville Repairs and Services

Nothing lasts forever. Even your Pontiac Bonneville’s engine parts and components will change. When something breaks or fails, we’re ready to help. Select a service or repair below to learn more about what we can do for your 2004 Pontiac Bonneville.

We Care for Pontiac Bonneville Engines

Pontiac Bonneville drivers trust that their Bonneville 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. Things can go wrong on the road. If they do, you’ll have to find a dependable 2004 Pontiac service center — quick! 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 Pontiac Bonneville engines. Schedule an appointment if you're experiencing problems that could require engine repair. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Illuminated Check Engine Light on 2004 Pontiac Bonneville

As soon as your Bonneville check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your or emission system, and it won’t go away by ignoring it. Causes may include a faulty oxygen sensor, bad spark plug, issues with your catalytic converter, or an engine vacuum leak, but that's only a few of the possible causes. Bring your Bonneville to Firestone Complete Auto Care to get computerized diagnostics and we'll determine exactly why your check engine light is on. Other signs your Pontiac Bonneville engine needs some TLC are essential fluid leaks, or a sinking feeling that something’s wrong.

Engine Repairs for Your 2004 Bonneville

If your 2004 Bonneville engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a service can wait, we’ll make sure you know. We'll also tell you if it's necessary for your safety. We want to provide you with the information you need to make an informed engine repair decision. Choose Firestone Complete Auto Care for Pontiac Bonneville engine repairs and you can feel good knowing that we only use Pontiac-compliant replacement parts such as the serpentine belt, motor oil seal, sensors, or other parts.

Questions About 2004 Pontiac Bonneville Engines

Why does my Bonneville’s check engine light come on when I start it? Generally, your check engine light turning on upon ignition is not a bad thing. It’s just your Bonneville firing up its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are Pontiac Bonneville engine noises bad? Strange under-the-hood noises can point to problems within your Pontiac Bonneville engine. 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 might be a sign of brake problems rather than engine issues.
What could damage my Pontiac Bonneville engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I use water in my Pontiac Bonneville 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 can cause a Bonneville engine to suddenly stop? Your Bonneville car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Where can I go for Pontiac Bonneville repair? Your local Firestone Complete Auto Care offers Pontiac Bonneville engine repair. Schedule an appointment today at one of our thousands of locations nationwide!