My CEL came on, so I took it to O'Reilly's to get it scanned and it throwing a plethora of codes. I know little about tuning and CEL code, but clearly, my o2(s) have **** the bed, it seems.

I have LTs so I'll be running the Vette variant o2, instead of going with an extension. What's the consensus on the "BEST" o2 sensor?

Also, can someone break down the issues in short bus term, for me, I'd appreciate it.

P0133
P0152
P0153
P0154
P0171
P0174

 

p0133 is bank 1 sensor 1 slow response. This could be the sensor getting old, I've also seen long tubes cause this.
p0152 bank 2 sensor 1 signal voltage is stuck high.
p0153 b2s1 slow response, just like p0133
p0154 b2s1 insufficient activity
p0171 and p0174 are lean codes for both banks. For diagnosis you try to start with the lowest # dtc first. With that many different codes I would suspect an issue with the wiring. But it could be bad sensors
I like to use the bosch sensors when they are available. denso and ntk are also acceptable to me

 

ntk only for me. have got other brands that were junk right out of the box.

 

I wonder if larger-diameter exhaust triggers the "slow response" codes - the sensors themselves aren't slow, but it takes longer for the exhaust to reach the sensor, and the PCM only knows what it hears from the sensor.

The PCM alternates between slightly-rich and slightly-lean to cause different reactions in the cats, and the sensors monitor the results.

 

NTK or DENSO. Not bosch.....definitely not bosch.

 

I think NTK and Denso were the top rated on this site years ago.

 

Thanks for the breakdown 👍

 

Is AC Delco no longer a viable option?

So the Vette o2 sensor reads the same as the Fbody o2? Are o2 sensors specific to LT1 / LS1?

I appreciate the help.

 

Any O2 sensor that you buy as a replacement will not be exactly the same as the OEM was from way back when on these cars, even the AC/Delco O2s are nothing like the originals. I've seen the best results on the Gen3/Gen4 cars with the Densos but that's not saying much as they all just tend to switch more slowly compared to the originals from back in the day.

Correct, long tubes almost always cause these codes... but everybody is changing the O2 closed loop integral delay when they add long tubes though right?

 

I've never really looked into it, but would an o2 simulator or just tuning them out be a better option?

 

Get the tune right first and then go into the tune and disable the long and short term fuel trims and set those in the DTC's to not report.

 

So does this mean that all of my o2 sensors **** the bed? Should I replace all of them? Are all 4 o2 sensors the same? Do I need to get the Vette variant for all 4?

Which Bank is 1 and which is 2?
Which Sensor is 1?


The diagram below is the only thing I found, but it's of a v6. Are the locations the same?

 

LS V8

Bank 1 sensor 1 front and sensor 2 rear driver side

Bank 2 is passenger side

 

I'm trying to find the PNs for the Denso, NGK and ACD ( I have the Bosh 13111) o2 sensors; what year Vette is the best option?

With headers, do all 4 require Vette sensors; which are Vette (long harness ) specific?

I forgot to add, I run a catch can; not sure if that matter in the whole scenario.

I appreciate you guys being patient with all my questions.

 

I don't remember what year Corvette those were for I think it was an 05.

 

NTK O2 sensors for me only, I put Bosch on my jeeps and they ran pig rich until I changed them to NTK, I stopped trusting them after that.

 

I feel the same. I don't like Bosch and I don't like using 02 extensions.

Since I'm not using my rear 02 sensors anymore. I re pinned the PCM so the rear 02 connectors are the fronts.

This way you can use the stock front 02 sensors without a harness or the long *** Bosch vette sensors.

 

Besides the sensor for my terminatorx, I've had really good luck with bosch sensors. And my terminatorx sensor has only went bad once. But my luck is mostly daily type vehicles

 

Oh that's a good idea 👍

 

I'm trying to find the PNs for the Denso, NGK and ACD ( I have the Bosh 13111) o2 sensors; what year Vette is the best option?

With headers, do all 4 require Vette sensors; which are Vette (long harness ) specific?

I forgot to add, I run a catch can; not sure if that matter in the whole scenario.

I appreciate you guys being patient with all my questions.