Q: Q: Check Engine light is not on

asked by on

The Check Engine light is not on. However, when I took my car in for an inspection, the inspector said I needed to replace the catalytic converter/exhaust manifold because he said my vehicle made a noise when I pressed the accelerator. I don't see any drop in fuel mileage and do not detect any weird smells. It only makes the noise when I accelerate, and doesn't make any when going regular speed.

The catalyst inside of the converter can break away and cause rattling noises in the exhaust, especially on acceleration. Over time the catalyst material can break apart and cause partial plugging of the exhaust. If the catalyst is no longer able to convert hydrocarbons, then it is entirely possible that a fault for catalytic converter efficiency will be stored. Because the catalytic converter is an emissions device, you may be required to have it repaired even it if is giving you no issues depending on your local statutes. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will be able to inspect the exhaust noise and perform the necessary 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. Q: Check Engine light is not on

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: Clicking sound form engine

A ticking noise upon acceleration is a common sign of a timing chain or valves not functioning correctly. If under a steady RPM the sound remains, it is in need of a valve job. If the sound subsides or goes...

Q: Intermittent hesitation occurring

Hi There, Code P1381 is related to the crankshaft position sensor malfunctioning. The crankshaft position sensor is an electronic device used to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to...

Q: Q: Check engine light

There are literally hundreds, if not thousands, of possible causes for the check engine light to come on. The only real way to know what has caused the light to come on is to pull the diagnostic trouble codes with...

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...
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...
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.