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

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your XJS testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Are Jaguar XJS engine noises bad?

Strange engine sounds can be a sign something’s off in your Jaguar XJS. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal 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 a Jaguar engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Jaguar XJS engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my Jaguar XJS radiator?

While it’s not recommended, you can use water in your XJS radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

What could cause my XJS engine to suddenly stop?

There are different reasons your XJS vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Who repairs Jaguar XJS engines?

Your local Firestone Complete Auto Care fixes Jaguar XJS engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 1986 Jaguar XJS Engines

Learn about

1986 Jaguar XJS Trim Options

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

V12/5.3L

1986 Jaguar XJS Repair

Nothing stays the same forever. Even your Jaguar XJS's many parts and pieces. When something breaks or fails, we’re ready to help. Select a repair or category to learn more about 1986 Jaguar XJS services.

We Know Jaguar XJS Engines

The Jaguar XJS is respected for its reliability. That might be why you bought it in the first place. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. If they do, you’ll have to find a dependable 1986 Jaguar service center — quick! That’s where Firestone Complete Auto Care comes in. We've serviced more than 500 million vehicles since 1926, and our technicians know Jaguar XJS engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 1986 Jaguar XJS

As soon as your XJS check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your or emission system that won't go away on its own. Potential causes may include a faulty oxygen sensor, bad spark plug, a clogged catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your XJS issues diagnosed and we'll determine exactly why your check engine light is on. rattling sounds, oil leaks, or a sinking feeling that something’s wrong.

1986 XJS Engine Services

If your 1986 Jaguar XJS needs engine repair, our expert techs will let you know what needs to be done and why before they get started. We don't start working until we have your approval. If a repair can wait, we'll let 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. By choosing Firestone Complete Auto Care for XJS engine repairs and you can feel confident knowing that we use Jaguar-approved parts and components like the cambelt, oil gasket, ignition coil, or another part.

Questions About 1986 Jaguar XJS Engines

Why does the check engine light in my XJS turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your XJS testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Are Jaguar XJS engine noises bad? Strange engine sounds can be a sign something’s off in your Jaguar XJS. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal 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 a Jaguar engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Jaguar XJS engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my Jaguar XJS radiator? While it’s not recommended, you can use water in your XJS radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
What could cause my XJS engine to suddenly stop? There are different reasons your XJS vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Who repairs Jaguar XJS engines? Your local Firestone Complete Auto Care fixes Jaguar XJS engines. Book an appointment today! We have thousands of locations across the country.