It's weird, the TVS2300 Colorado is the 2nd truck I have had o2 sensor issues on. The truck does not throw o2 sensor codes, but the throttle response starts to feel "mushy" (especially on cold start). I replaced the o2 sensors with AC Delco brand which greatly improved the cold start throttle mushiness, but now I randomly get o2 sensor codes P0053, P0054, P0159. I want to install the best o2 sensors possible, what does everyone recommend?

On my turbo Silverado, I had this same issue after like 15k miles on the build, it took me forever to find the problem because there were no codes. I think it might have to do with running E85 100% of the time?

 

Denso/Delphi would be my choices.

 

I've been using Bosch all this time thinking they were the cat's meow but I come to find out they're junk.

 

I have a coworker with an Astro van that he was having some issues with an o2 code.

I asked him what kind of o2, he said Bosch and laughed in his face.

I told him to put a Denso or Delphi sensor in. He did and it fixed his issues and he’s been fine since.

That was this time last year.

 

So strange because Bosch carries such a good name on everything else. I've gone ahead and ordered some Delphi's let's see how they do. The only PITA issue is, I remember this exact same scenario with my turbo Silverado. I had Bosch sensors, they gave me issues (but no codes) and I replaced with Denso. Truck would literally not run with Denso's, ran like ****. I think maybe because the truck had been tuned on the Bosch sensors that it wasn't vibing properly with the Denso's.

 

I would retune it. No 2 o2 sensors will read the same.

My new Denso’s threw my trims off, not a lot but enough for me to want to tighten up the VE table.

 

Annnnnd..........???

I don’t think Bosch’s are junk. I think it may be more of electronic device A reads vs electronic device B.

Think about when GM wrote the code for the vehicles. Did they use Bosch sensors? No, they used Denso/Delphi.

It’s just a hunch so definitely don’t take my word for it.

@smokeshow on the other hand. Maybe he could provide some reasoning.

 

I have used Bosch for many, many years with no issues. I think I only needed to replace them once due to both cats coming apart and smashing them.

 

The O2 sensors aren't active on a cold start so I'd be looking elsewhere. I can provide O2 sensor information but I don't think it is pertinent here.