Q: Check Engine Light on, catalytic converter and O2 sensors need changing - $3000

asked by on

Really? is it possible that only O2 sensor need change? Can I use after market parts and save a bunch of money ? I only drive about 8000 miles a year and will not put any more than 15-20k miles on it before I get new car? How long can I drive it like this?

My car has 121000 miles.
My car has an automatic transmission.

Hi there:

If you’re Check Engine Light is coming on and somebody diagnosed this as a problem with your O2 sensors or the catalytic converter emissions system, it’s highly possible that the trouble part are the front or back bank O2 sensors. Most O2 sensors are OEM however there are aftermarket equivalents available in some cases. The best way to know for certain as to what you need to replace is to have a professional mobile mechanic, like one from YourMechanic, complete a Check Engine Light inspection, so they can pinpoint the source of the issue. If the catalytic converter is found to have been faulty, replacing the sensors won’t help.

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. Check Engine Light on, catalytic converter and O2 sensors need changing - $3000

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: Cadillac CTS cruise control not working

Hi there. Usually an oil change will not impact the cruise control system. Newer cars use a fully electronic setup to maintain speed and may be able to maintain speed and distance behind the car in front of you. These...

Q: Can i remove oil pan from 05 CTS 2.8 without pulling motor ?

Hello, thank you for writing in. The engine will need to at least be partially removed from the vehicle in order to remove the pan. You have to compensate for the oil pick up tube at the bottom of the...

Q: my 2005 cadillac escalade wont shift out of first gear what can be the problem

Hi there. Thanks for your email to YourMechanic.com's Ask a Mechanic. In most cases, when a transmission will not shift out of first gear, it is due to one of two things. First, and most common; is due to dirty...

Related articles

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...
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.