Uploaded October 2015 | Updated September 2026, 2 weeks ago
This video will help whether you have O2 sensor issues like P0141 inactive heater circuit, or a P0420 for catalytic converter efficiency below threshold. I talk about it all.
This also shows where the PCM is, how to get the stereo out in case you're upgrading sound or you have other diagnostic that needs to be done at the PCM, engine control module or computer.
Since I was next to my terrible welding I shared some about my catalytic converter upgrade and you can learn more from a few articles. I share my theories why a bigger catalytic converter got me more wHP. carmilespergallon.blogspot.com/2014/08/catalytic-converter-and-horse-power-why_27.html
My first 20 minute ultimate editing experience. Super hard to do! I cut at least 10 minutes of video caring about your time and I've included the most information yet.
I have multiple streams of information. Voice overs and I showed the most wrenching ever. If you're one to find that more boring I've dubbed over it maximizing the information I could share about this Chevy Prizm's downstream O2 sensor removal. My situation was unique. It's had to pull the dash to get to the wiring since it had been ripped out from below!
Oh and I know I ended with they'll instead of *there'll be a part 2 if i get a catalytic converter below threshold efficiency code P0420. Too excited to get this up. I'll try to fix it soon.
Part 2 here:
youtu.be/Ky-A9nUeIgU
Dash reinstall Part III (Downstream O2 sensor):
youtu.be/ISW7yJdFGmQ
#HO2S is how your oxygen sensors will often be abbreviated or your scan tool's live data. HO2S heater circuit testing is how I knew these wires needed replacing under the dash. #OxygenSensor
Due to factors beyond the control of DE Nichols/AutoBravado it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DE Nichols/AutoBravado assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DE Nichols/AutoBravado recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DE Nichols/AutoBravado, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DE Nichols/AutoBravado.
This video will help whether you have O2 sensor issues like P0141 inactive heater circuit, or a P0420 for catalytic converter efficiency below threshold. I talk about it all.
This also shows where the PCM is, how to get the stereo out in case you're upgrading sound or you have other diagnostic that needs to be done at the PCM, engine control module or computer.
Since I was next to my terrible welding I shared some about my catalytic converter upgrade and you can learn more from a few articles. I share my theories why a bigger catalytic converter got me more wHP. carmilespergallon.blogspot.com/2014/08/catalytic-converter-and-horse-power-why_27.html
My first 20 minute ultimate editing experience. Super hard to do! I cut at least 10 minutes of video caring about your time and I've included the most information yet.
I have multiple streams of information. Voice overs and I showed the most wrenching ever. If you're one to find that more boring I've dubbed over it maximizing the information I could share about this Chevy Prizm's downstream O2 sensor removal. My situation was unique. It's had to pull the dash to get to the wiring since it had been ripped out from below!
Oh and I know I ended with they'll instead of *there'll be a part 2 if i get a catalytic converter below threshold efficiency code P0420. Too excited to get this up. I'll try to fix it soon.
Part 2 here:
youtu.be/Ky-A9nUeIgU
Dash reinstall Part III (Downstream O2 sensor):
youtu.be/ISW7yJdFGmQ
#HO2S is how your oxygen sensors will often be abbreviated or your scan tool's live data. HO2S heater circuit testing is how I knew these wires needed replacing under the dash. #OxygenSensor
Due to factors beyond the control of DE Nichols/AutoBravado it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DE Nichols/AutoBravado assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DE Nichols/AutoBravado recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DE Nichols/AutoBravado, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DE Nichols/AutoBravado.
