00-05 Lexus IS300 - B1S2 Oxygen Sensor Replacement. 3.0L 2JZ-GE - P0037 H02S Heater Circuit Low

[@SukottoSama]

im having problems with low acceleration sometimes no power while pushing the peddle to the floor it's really bad on hotter days earlier i came to a stop right before a hill and had to turn off the engine and crank it again and it's not like the rpms are bad or the engine is dying or back firing ive check the maf and i have a p0037 could this be my problem? i thought an oxygen sensor couldn't control the throttle i also have p0441, p0442, p0446 which is all the Evap System codes. im laughably too poor to be asking a mechanic what's wrong with my is300

[@davidyoung1610]

I’m confused. Isn’t the 1st gen. IS300 B1S2 sensor Danso Part 234-4015? Danso is one of the OEM for Lexus and that part should drop right in without re-pinning any connector.

[@RJayStyle]

They make a factory Lexus Denso Oxygen Sensor this is the equivalent to the factory Lexus oxygen sensor which is also made by Denso except for the connector it will not plug in if you look inside the connector lock it doesn’t plug in the same way. This sensor connection does not plug in like factory. For a plug and play Lexus oxygen sensor you’d have to buy it directly from Lexus which will cost more. This is the more affordable Denso Oxygen sensor and you have to swap your original connector if you’d like it to plug in like factory without cutting, splicing, butt connecting.

[@davidyoung1610]

@@RJayStyle Thank you very much for the information!

[@RJayStyle]

No problem, you like this video please Subscribe. Thanks.

[@rickyaguilar7572]

hello , Can a faulty bank 2 sensor 2 trip a P0430 code? Edit: also, If i do have code P0430, and i want to try replacing an 02 sensor first , is it only bank 2 sensor 2 that i need to replace to try and fix code p0430. Everyone is telling me to get a new CAT. But those are expensive as i am in CA. Thank You. SUBBED.

[@RJayStyle]

Ricky. Yes, you should always check the o2 sensors. Most of the time it’s the Cats that have degraded over time. As these cars tend to have higher mileage now. To confirm and condemn this for sure if you have a laptop with techstream or a good scan tool. Monitor and graph the response of your o2 sensors signals/waveforms live data. Compare the upstream and downstream pre and post sensors. On both sides of the cats. You can see what known good readings are on bank 1 and compare it with the values on bank 2. This will tell you whether the catalytic converter is actually operating correctly (efficiently) you should see this on the data list if the o2 are responding. There are a few other variables you can check that can be causing your p0430 codes. But the first is to check for exhaust leaks, second the o2 waveforms, last the cats. These cats are expensive a p0430 is on the bank 2 side. And p0420 is on the bank 1 side. If you want to rule out the o2 sensors. If the catalyst is functioning normally, the waveform of the oxygen sensor after the catalyst switches back and forth between rich and lean much more slowly than the waveform of the oxygen sensor before the cat. If both waveform change at a similar rate, it indicates that catalyst performance has deteriorated. If you have a known good o2 sensor you can swap one in before replacing it and recheck the values on the data list. It won’t hurt before purchasing. Take caution when removing the o2 sensors they can be tricky and strip out the threads leaving you to either retap or buy brand new sensors and cat assembly. Sometimes the original o2 sensors can be brutal to remove and almost easier just to replace if the threads rust inside the cats. It can be a disaster repair. Just some advice. Do your fair diligence diagnosing the voltages the o2s read so you have an idea of the sensors are dying, slow to respond, or at the thresholds of operation.