5 Dollar Check Engine Light Fix

If you have a check engine light for a P0420 this could potentially work for you.
Different vehicles may be more or less sensitive to this trick and it may or may not work for your vehicle.
Do your research before attempting this, when messing with delicate electronics like your ECU/PCM you could possibly damage something and I can't be held liable for that.

[@donnboyd7933]

You made a mistake when looking at your aftermarket O2 sensor. The Black lead is where the Oem Blue lead was, the Grey lead is where the Oem White lead was.

[@stevenh4970]

That's what he said in the video after he stated it wrong the first time. Black is the blue wire...

[@kristianjpatterson5480]

ok so as a few others have asked did the final solution minus the capacitor work out for you long term or did you need a different fix

[@kristianjpatterson5480]

running an 06 xb and it appears to be functional after removing the capacitor no codes yet but still waiting on evap to clear all others are clear ie p0420 . when including the elctrolytic cap it would give a p0136.

[@gabrielconstantine7384]

The schematic shows a polarized electrolytic cap, not a ceramic one.

[@am6066]

Thanks for the video, wiring diagram, part #’s and detailed instructions!

[@dannypalmer7701]

Hum?

[@dannypalmer7701]

Resistor goes into the + and the Capacitor goes on the negative and the +

[@gallantfox4776]

Hello I did this on my tundra and give me a different code saying circuit is to high and gave me a ecu code Used 1M ohm and 4,7 50 v capacitor Can u help me pls

[@dannypalmer7701]

Online on Ebay?

[@markhanks-qd2em]

i really appreciate your honest that you said it wasnt working

[@NycCitizen]

You did not install per the schematic. You put the capacitor on the o2 sensor side of the resistor…it’s supposed to go on the Ecu side of the resistor. AND , the capacitor is supposed to be a polarized one AND the positive side of the capacitor needs to be installed at the resistor signal line junction.

[@stevenh4970]

I'm confused, the capacitor is on the plug side which is towards the computer in the video.The sensor side is going down into floor board to exhaust. It is according to diagram. He did have the wrong capacitor, but ended up removing the capacitor. If it's actually working with just the resistor, I may just do this.

[@donnboyd7933]

You need to use an electrolytic cap. They have positive and negative leads. The cap you used doesn't.

[@liveoak7838]

I made this work using the same cap he used

[@1fly2fly24]

I noticed that you had, on the positive side, wired the capacitor on the ECU side of your resistor, and on the diagram it shows the capacitor being on the O2 side of the resistor. final output changed.

[@stevenh4970]

The capacitor is between resistor and ecu which means it's on the plug side of the oxygen sensor pigtail. It's the same as on the diagram.

[@arianamay7023]

Wish coller light on the dash read bad oxygen sensor

[@ruthlex755]

When your check engine light comes on plug in a obd2 port reader, mostly this mod is good if you are trying to make Greta thunberg Happy by removing the catalytic converter guts 😀 and get better fuel economy 😊

[@jonivanart]

You may have the wrong type of capacitor. The type you have really don’t have a polarity. You have a ceramic capacitor. You need an electrolytic capacitor.

[@lukaszperski9370]

Its probably tantal capacitior, they have a polarity , its good to use such a type

[@Ethan_tran]

Hi, ive done exactly the same way on my mercedes A class (catalytic deleted), but my CEL still saying P0140: oxygen sensor no activity.

[@welfixchile379]

That's because this filters the signal too much, add an extra resistor to avoid P0140

[@yucatecosoda8775]

0:19

[@CharlesLease-ei1ee]

Yeah, five dollars and then later on down the road is Kakashi hundreds because she didn’t fix the real problem

[@chadbarta8055]

I had the same problem. PCM error codes and voltage codes. Not sure about this as a fix

[@erickushner9869]

Hello what was the end result did you get the fix perfected ?

[@carlbrooks90]

The blue wire goes with the black wire

[@CharlesLease-ei1ee]

Because you’ve done it all wrong

It still working?

[@mauriciomedina8178]

This only erases one code and you get a new one.

What you talking about

[@fflynnful]

I did this on a Honda Accord 2005, no more PO420, but now have PO190. So, fixed one code and another came up. PO190 indicates a slow response from O2 sensor, indicating a bad sensor. Sensor is good, was replaced recently. @

[@alejandronunez8620]

True I get like 2 more codes 😆

[@busa_rider_cy4012]

black wire is ground

[@ARCSSelfDefense]

Nope...all the diagrams show gray = ground

[@brianthomas7520]

If you don’t know if it works why try

[@justinhardenbrook7076]

Isn’t that how people figure out if shit works or not? 😂