Skip the auto shop - Our mechanics make house calls

Q: My car is shaking.

asked by on

The problem started yesterday morning on my way to work. The "engine service soon" turned on and my car started to shake and was driving extra slow. I just got the car not even a month ago so idk why it's misfiring already. I went to a local auto shop to ask questions and they told me that I have to get the coil changed and if I don't do it soon it will miss up my engine.

My car has 122947 miles.
My car has an automatic transmission.

A: Hello. the Diagnostic Trouble Codes would h...

Hello. the Diagnostic Trouble Codes would have to be retrieved to begin the diagnosis. Unless the shop retrieved all codes and performed a diagnosis and tested the coils (there are six of them on your engine), what they have told you is pure speculation. Although a coil defect can cause a misfire, there are quite a few causes elsewhere in the ignition and fuel system.

As far as the consequences though, they are giving you very good advice and actually engine damage is just the beginning of the concerns if the engine is misfiring. If the misfire(s) result in unburned (raw) gas entering the catalytic converter, you can destroy the catalyst in very short order.

I would be ashamed to find out that your only issue is caused by a mere faulty spark plug wire (not that costly) but you continue to drive the car causing hundreds of dollars of damage to the catalytic converters (converters are not repairable; the factory OEM converter on your car could easily be $500).

If I were you, I would not drive the car if it is actively misfiring. A mechanic of your choice or YourMechanic, if in your city, could quickly diagnose your Check Engine Light and get it repaired and reduce the chance of further damage. Unfortunately, engine misfires in modern vehicles are not as inconsequential as those that might have occurred in older vehicles prior to the 1970's.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Ticking noise becoming faster with higher RPMs

Hi there. In most cases, if this happened all of a sudden and went away after a moment, then it may just be low on oil or it may need an oil change. I would check the oil first. If...

Q: Overheat light came on

Hello. Yes, your vehicle is equipped with an electric water pump that may have experienced a failure. Once an engine overheats, the thermostat is usually damaged in the process and it is recommended both be replaced at the same time...

Q: Check Engine light on due to misfire

Code P0301 indicates a misfiring issue. You likely need an ignition coil. There is a possibility that oil is leaking into your valve cover, which is causing this. If you haven't replaced the spark plugs, you will need to soon....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...