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

asked by on November 17, 2016

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.

Check Engine Light is on Inspection $79.99 - $89.99 Get a Quote
Catalytic Converter Replacement $279.51 - $3103.51 Get a Quote

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.

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

What others are asking

Car hesitates when accelerating

Hi there. It is very likely that a faulty throttle position sensor (TPS) is causing your problem. The TPS receives signals from your computer telling it where to position the throttle at any given time. A faulty TPS will also...

I have injector circuit open on 2, 4, and 6 error codes (codes P0202, 204, and 206)

Hi James. I would suggest purchasing a service and repair manual for your 2006 Cadillac CTS, as it will provide you with a wiring diagram for the fuel injector wiring. It is very common on these Cadillac's for the wiring...

p0340

Some of the common causes of Diagnostic Trouble Code P0340 include camshaft position sensor circuit wiring that is broken, shorted, or corroded; a camshaft position sensor circuit connector that is broken, shorted, or corroded; a faulty camshaft position sensor; a...

Strong gas smell but nothing leaking under hood

Hi There, A few things may cause the vehicle to produce a strong fuel smell. A clogged or dirty EGR valve may cause the car to emit a strong fuel smell due to the excess hydrocarbons as a result of...

Check engine light p2068

It doesn't like you have a fuel sensor problem. The codeyou're having could be due to an issue possibly with a wire connection or just a bad sensor. You will find the sensor on the right side of the fuel...

My reduced engine power warning light came on after I turned the car off for a minute and turned it back on it went away what’s go

Hi Kristin. Thanks for contacting us tonight. Since the Reduced Power light can trigger for a number of different reasons, tracking down the exact cause is extremely important, if the vehicle is not properly diagnosed and repaired, the Reduced Power...

How can i disable the anti theft system, the light keeps blinking?

Hi there. Aftermarket alarm systems can create problems, typically from poor installations. The vehicle's wiring harness is usually tapped into and removal of the alarm system is more than just pulling a fuse. Most aftermarket alarm systems are installed under...

Rough riding new tires

Hello! There have been many complaints regarding the Escalade having a bumpy ride. Oftentimes the dealership will say that the ride is normal. I would suggest going back to the dealership and test driving another Escalade with them and comparing...

What Do Transmission Error Codes Tell You?

Using transmission error codes is a necessary procedure for a transmission technician since automatic transmissions have been computer controlled for over 20 years. The transmissions currently in use are very different to diagnose and repair than transmissions from decades ago....

Related articles

P2020 OBD-II Trouble Code: Intake Manifold Runner Pos Sensor/Switch Circuit Range/Performance Bank 2
P2020 P2020 Code Definition A P2020 code is a generic powertrain code related to the fuel and air metering and auxiliary emissions control systems. The Intake Manifold Runner Control (IMRC) controls are utilized to change or control airflow in the...
Where Is the O2 Sensor Located?
Oxygen Oxygen sensors O2 sensors will always be located in the exhaust system. Their function is to sense how much oxygen remains in the exhaust that is flowing out of the engine, and report that information to the vehicle’s engine...
P2258 OBD-II Trouble Code: Secondary Air Injection System Control A Circuit High
P2258 P2258 Code Definition The P2258 trouble code is a generic powertrain code related to fuel and air metering (air injection circuit). This code appears when the engine control module (ECM) detects higher voltage levels than are acceptable in the...