Q: I'm getting a po420 code is it possible it could be due to my rear catalytic converter even though there's no sensors after it? Or

asked by on July 15, 2017

I'm getting a po420 code is it possible it could be due to my rear catalytic converter even though there's no sensors after it? Or Is it most likely my front one off the manifold?

My car has 102500 miles.
My car has an automatic transmission.

You will have two O2 sensors on this engine. One will be before catalyst in manifold and one will be after or in the rear of the catalyst. If you do not have one then vehicle was modified in some way and it was removed and hole plugged. Recheck again and you should see the sensor in the pipe after the catalyst.

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

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

Traction control warning comes on all the time

This issue should be covered by a recent GM special service bulletin 14636 that will replace your throttle position sensor and pedal assembly. The bulletin is dated April 8, 2015. Make an appointment with your local dealer and they will...

Is it possible to replace the standard Dimension Stereo in a Non Nav Limited with the Navigation system?

Your best bet is to check a website like Crutchfield.com. They have the best information on what systems will fit your car. Attempting to fit an OE Hyundai navigation/radio unit will probably cost a lot more than you think. Also,...

I have a 2002 Tahoe. My horn is not working. Is there a video or instruction paper that shows how to open steering wheel cover?

Hi there. To remove the horn button and replace it in the steering column / steering wheel, perform the following steps: (1). Disconnect the battery before removing any electrical wiring on your vehicle. (2). Release the airbag by...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Colorado
The The 2012 Chevrolet Colorado is the perfect size pickup for running errands on the weekend and doing light duty chores around the yard. For those who don’t need a full size pickup, the Colorado offers almost everything a full...
The Best Used Cars to Buy If You Love Camping
Do Do you love camping, getting back to nature and enjoying life in the great outdoors? If you do, then you know that getting there can be half the fun, and it’s even better if you have a great ride....
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...