Will a bad oxygen sensor always throw a code? Vehicle is a 91 Chevrolet K1500. 4.3 liter V6. It has only one sensor that is upstream of the catalytic converter.
Will a bad O2 sensor throw a code?
- Thread starter otis24
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I looked up that upstream sensor and saw it has a single lead. Don't know.
The OBDI of those years covered the ABS system and.....?
The OBDI of those years covered the ABS system and.....?
It should show P0130, IIRC GM trucks this year still had the old bead/pellet cat that clogged badly and caused engine performance issues.
I just looked it up, if you still have the original cat (doubtful) replace it with a modern universal.
www.curbsideclassic.com
I just looked it up, if you still have the original cat (doubtful) replace it with a modern universal.
Automotive History: The Dawn of the Catalytic Converter - Who Put the Cat Out? - Curbside Classic
Legend has it, “Let there be catalytic converters!” said GM’s Ed Cole, and »poof« the catalytic converter sprang into existence and evolved into the kind we now use. How it […]
Yes to a point. If it's open or shorted it will. Won't if worn or slow You short out 2 contacts on the connector and count flashes.
YES
No they get terrible before any of them throw a code. And some don't ever.
Always? No.
They are asone what consumable item. As they wear they read leaner and leaner making your vehicle run richer and richer.
They are asone what consumable item. As they wear they read leaner and leaner making your vehicle run richer and richer.
For your OBD1 single wire setup....for most conditions NO they won't throw a code. This is where you have to review the live data to see how the 02 is performing and make your own diagnosis. OBD2 96+ of course have much stronger self diagnostics and will set codes more but even then reviewing live data is your best bet in seeing how it is performing.
I'm going to proactively replace my elantra's 02 sensor, as mileage seems to have dropped a bit.
Rock auto has 2 sensors from bosch
Bosch 17270 as an upstream
Bosch 17319 as a downstream or upstream with calif emissions.
My car is not calif emissions, but what would be the difference in them? I would think most of the calif emissions difference would be in the ECM programming.
The 02 sensor just gives data to the ecm, what would be different?
@Trav, @The Critic what do you think ?
Rock auto has 2 sensors from bosch
Bosch 17270 as an upstream
Bosch 17319 as a downstream or upstream with calif emissions.
2013 HYUNDAI ELANTRA 1.8L L4 Oxygen (O2) Sensor | RockAuto
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www.rockauto.com
My car is not calif emissions, but what would be the difference in them? I would think most of the calif emissions difference would be in the ECM programming.
The 02 sensor just gives data to the ecm, what would be different?
@Trav, @The Critic what do you think ?
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Bosch 02 sensors seem to die quicker than the denso or ngk ones.
Even on modern cars I've had lazy 02 sensors cause crazy issues and throw lean codes and fuel trim codes and cause surging idle (wideband 02 on an old civic) without an 02 sensor code.
I can guarantee that there are NO issues with my CATalytic converter.
Install a Heated 3 Wire O2, GM part# 19178959 & wire in the power & ground for the heater....Worthwhile upgrade so the ECM doesn't drop in & out of closed loop.
On the old one wire O2 sensors, I usually change them out every 30,000 miles or so. I was taught that years ago because O2 sensor performance degrades over time. Also, back then, I had no equipment that could graph the performance of the sensor to see if it was switching like it should. I have never had any of my OBD 1 vehicles set an O2 sensor code.
I also always try to use the OEM sensors if available.
I also always try to use the OEM sensors if available.
