Skip the auto shop - Our mechanics make house calls

Q: Loud roaring sound from engine when accelerating

asked by on

I can hear a loud roaring sound coming from the engine as the car accelerates. The Check Engine light also comes on. when I had it checked, I got error codes dealing with an air leak.

It sounds like you have an exhaust leak. An exhaust leak can cause a Check Engine Light. It will give the O2 sensors a false reading. The exhaust runs nearly the length of the car and consists of two catalytic converters, three mufflers and piping. It can leak anywhere and usually leaks due to rust. Only the broken section needs replacing, but it will need to be inspected to see what needs replaced, and what parts can still be used. Replacement exhaust is a lower quality than factory. Factory exhaust is very expensive when it is available. The Check Engine Light should go out if the exhaust leak was the cause, so don’t pay extra to have it diagnosed. If it remains on after a week, then have it diagnosed.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: I need the ecm/pcm replaced do you guys come out and do that?

YourMechanic can replace the ECM/PCM on your vehicle if a diagnostic has determined that it has failed. However, please note that PCM's rarely are the cause of a no start condition and thus all other potential causes should be investigated...

Q: Loud knocking noise.

When you say a knocking noise I assume you are referring to the engine. If the engine is indeed making the sound the first thing I would recommend is to check your oil level. This can be done by pulling...

Q: Chrysler 300M won't start

Try to lock and unlock the door with the key to see if the alarm is deactivated properly. If you see the thief light on the dash still lit when you try and start it, then it is not deactivated...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.