Q: Muffler delete, check engine light

asked by on

I preformed a muffler delete at home, just unbolted the 2 nuts and slipped it out of the hanger. All was well for a couple days but now the check engine light came on this morning and I'm just wondering if that's the o2 sensors or if there is something else causing this issue?

My car has 56000 miles.
My car has an automatic transmission.

It is illegal in almost all jurisdictions to delete the muffler from your vehicle. Of most concern, the deletion will negatively impact your health, and that of your passengers, as excessive noise is guaranteed to damage or degrade your hearing. The wisest course is to re-install the muffler. With regard to the check engine light, there might be a cause and effect relationship between the removal and the illumination of the check engine light but that will depend on exactly which OBD-II diagnostic codes have been set. A muffler creates a small amount of back pressure and it is conceivable that the normal range of operation of an upstream sensor has been affected by the reduction in back pressure. Still, that possibility is speculative and the actual circumstances can only be determined once the code(s) are read and whether those codes even implicate a potentially relevant component. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you. And, please keep YourMechanic in mind for your maintenance and 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. Muffler delete, check engine light

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: Car wont start - 2009 Hyundai Sonata

Hey there. The battery and starter are key components to starting the vehicle. If the battery is weak, it can cause a slow or sluggish cranking if it is not providing enough power to the starter. Also, the starter can...

Q: Q: Transmission

Hey there. I would first recommend checking the transmission fluid to be sure it has the proper amount of fluid in it. Low transmission fluid can definitely cause slipping. Also, check to be sure there are no Check Engine Lights...

Q: Need to know if I should replace my turbo or not

Hi, thanks for writing in. The turbo system is comprised of several different components. Without knowing the exact trouble code, it would be hard to guess at what is going on. There could be a bad sensor, a leaking intake...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...