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Oxygen Sensor Questions?
I just realized I never wrote an update based on this original post. I should have listed the mileage when I replaced the o2 sensors, but that was the fix. Truck has ran great ever since then. That was at least 20,000 miles ago, and just an FYI update on what has happened since then with the truck: replaced one water pump, replaced one heater core, and just fixed a vacuum leak in the emissions system that kicked the code p1494. It was a broken vacuum line and fixed the problem. This forum is absolutely amazing, I have learned more here about my truck than I could have going through and automotive program. Thanks for everyone's help on all topics! By the way, my truck just rolled 164,000 and it runs great, the next big fix is going to be a dreaded transmission rebuild, it's still running at this high of mileage, almost unheard of. It does slip at very high rpms though. Anyways, see you on the next topic.
FAIL. Oxygen sensors at end of life give up crappy waveforms but don't go open or short, and it's rare for a DTC to be set before the driver complains of lost performance and fuel economy and usually very low idle with "a sucking noise".
We go round and round on this pretty regularly.
We go round and round on this pretty regularly.
had 266k on it
If they were indeed the originals, they were way past due for a change! You should see improvement.
That's music to my ears..I did remove the -bat cable for a little bit (prob should have during the swap) my service manual didn't say to, nor does it mention relearning the PCM..what's your thoughts on doing it again with the + as well?
No problem with the cable being longer.....but it was probably the rear one which is longer from the factory. As long as it connects and read, it will be good. I use two rear O2s on my Yota because it is easier to connect with the extra slack. Just make sure the wire does not get against the exhaust and melt insulation.
No, that should not cause a problem. What brand of sensor(s) did you buy?









