Q: My Check Engine Light came on and my car rattles horribly.

asked by on

I was just wondering what you thought my issue could be. I was driving home when I noticed the rattle and not long after my check engine light came on. It rattles pretty bad now when I let it idle. I was curious as to what you thought it could be but my first thought after a bit of research was the catalytic converter.

The catalytic converter will definitely cause a rattling sound when it is worn out or needing to be replaced, which will also cause your Check Engine Light to come on. There are small honeycomb like pieces inside the converter that can become brittle over time and will break and rattle around. If you need further help, I would recommend having a certified technician diagnose the Check Engine Light and rattling noise to verify the problem and move forward with repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My Check Engine Light came on and my car rattles horribly.

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: Check Engine light; catalytic converters failing

Hi there. It sounds like you have a few issues going on here. If the catalytic converters are failing, then the converters will need to be replaced. They tend to either fail and become clogged causing a loss of engine...

Q: Loud metallic clunk and stops cranking when trying to start after removing and reinstalling upper intake manifold,

Hi there. Check the fuel injectors and make sure that they are hooked up properly. A leaking fuel injector will cause fuel to flood the cylinder and hydro lock the piston making the engine stop cranking. Also, check for anything...

Q: When engine is cold it studders and misses but when warm it runs juss fine no codes and engine light isnt on why is this happening

When an engine is cold it will need more fuel to run correctly. I would recommend having the fuel injection system cleaned to see if it helps to run better. If the flush does not work then a scan will...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.