GMC Terrain 2.4 P0420 | $20 FIX !!!

[@OldSoulMillennial]

* UPDATE* The bottle of additive only cleared the code for a few weeks. I Ultimately ended up removing the downstream 02 sensor, and I installed a Spacer (Off road use of course). Here is a link to the space: amzn.to/3UQYZvs

[@jrea8401]

Do you have to install both or can it just be one?

[@OldSoulMillennial]

@@jrea8401 only do attempt this on the downstream sensor

[@jrea8401]

@@OldSoulMillennial okay thanks 👍🏽

[@OakCliff1226]

When you said "This is illegal" I immediately subscribed to your channel😂😂😂

[@HTTR_FOREVER21]

Offroad applications 😉 😉

[@doncorrell9951]

Is the Terrain still burning oil after the timing chains replacement, or did it get any better?

[@isellfoodstampz]

Timing chains wont change that. Its the piston rings. They make them "loose" for "fuel economy"

[@SG-gc7mn]

I used a spacer, got rid of the p0420, but got p0138 and p013e

[@HTTR_FOREVER21]

I’ll use the spacer😂😂