What's the consensus on the "BEST" o2 sensor?
What's the consensus on the "BEST" o2 sensor? 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
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
Last edited by RONIN LSX; Jun 16, 2025 at 10:40 AM.
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
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
Last edited by Lsxford; Jun 16, 2025 at 12:51 PM. Reason: accidental post too soon
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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.
The PCM alternates between slightly-rich and slightly-lean to cause different reactions in the cats, and the sensors monitor the results.
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
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
Thanks for the breakdown 👍
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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? 
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
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
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?
Last edited by RONIN LSX; Jun 17, 2025 at 06:08 PM.
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.
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.
Last edited by RONIN LSX; Jun 18, 2025 at 09:34 PM.
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.
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 
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.
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.
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.
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.