DIY O2 Sensor Replacement
#17
O2 sensor replaced, still getting CEL, VSC and PO37
So I replaced the bank one, back O2 sensor and i am still getting the PO37. Any ideas? I did use the cheaper Chinese O2 sensor, could that be it or something else? Not throwing any other codes. I did an oil change, cleaned the K&N filter, cleaned the battery terminals and the MAF sensor. Vehicle has 185,000 miles and has always run like a champ.
Thanks in advance
Thanks in advance
#18
Stll getting PO37 code...help
OK, so I have tried three O2 sensors for bank one, down stream O2 sensor, still throwing the PO37 code. Any ideas? Could this be remedied by changing the spark plugs? Something else? I cannot pass Colorado emissions until I get this fixed. Thanks in advance.
#20
thanks evi
great write up but just one question: did you clear the codes with techstream?If not, what are you using? thanks.
The following users liked this post:
MrHarris (03-24-22)
#22
Driver School Candidate
Join Date: May 2018
Location: CA
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Greetings all!
When my '07 Rx350 hit 156k miles, the check engine and VSC lights turned on...
So i first tried resetting battery and re-tightening gas cap, both lights remained on...
Went to AutoZone to OBD2 it... Result: P0037 HO2S Heater Control Circuit Low (Bank 1, Sensor 2)
My plan is to DIY replace the Oxygen Sensor, however...
I've found that there are 2 types of Denso Downstream Oxygen Sensors...
I don't know which one to get. I've located my oxygen sensor, and it's location and parts are about the same as the given examples in this thread... (which lean towards the 234-4509)
But I also noticed that the Driver Side part is for Japan-built models... and I when I looked up my VIN#, results showed my vehicle was Japan-built... (so I'm thinking maybe the 234-4149 part)
Is there anyone that can help clear my confusion? Any comments and additional info is greatly appreciated! Thanks in advance.
When my '07 Rx350 hit 156k miles, the check engine and VSC lights turned on...
So i first tried resetting battery and re-tightening gas cap, both lights remained on...
Went to AutoZone to OBD2 it... Result: P0037 HO2S Heater Control Circuit Low (Bank 1, Sensor 2)
My plan is to DIY replace the Oxygen Sensor, however...
I've found that there are 2 types of Denso Downstream Oxygen Sensors...
I don't know which one to get. I've located my oxygen sensor, and it's location and parts are about the same as the given examples in this thread... (which lean towards the 234-4509)
But I also noticed that the Driver Side part is for Japan-built models... and I when I looked up my VIN#, results showed my vehicle was Japan-built... (so I'm thinking maybe the 234-4149 part)
Is there anyone that can help clear my confusion? Any comments and additional info is greatly appreciated! Thanks in advance.
#23
Racer
Thread Starter
#24
Driver School Candidate
Join Date: May 2019
Location: CA
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Bank1 sensor 1
Does anyone have instructions on changing the upstream O2 sensor on bank 1? I know it is hidden behind the engine and is very difficult to get to. The downstream was a piece of cake following these instructions.
Thanks
Thanks
#25
Actually pretty easy to reach, get under the car and have the right tools-pb blaster, 18" longs 3/8 swivel head ratchet wrench, and the o2 sensor socket.
The problem I am having is getting the connector loose. I can reach it from up top and hugging the motor. It requires removing some hoses and the throttle? housing.
I also have to grease up my forearms with vaseline and stand on a step ladder to reach it.
I can reach, press the clip, but it won't budge.
Pretty frustrated with something that should actually be easy as I can reach it.
If you are still working on this, be careful as there are a couple of things that can cut your fingers and I'm pretty sure the hood latch just dislocated a rib.
But that's my fault.
I read that some people suggest cutting and splicing the wires. But that seems an very hard reach.
I will let you know how I end up getting connector loose.
I did make sure that I could bust the o2 sensor loose at the fitting before messing with the electrical connector.
#26
Okay,
A late update.
I got the sensor off. Pretty easy once I figured it out and had a plan.
You need a helper.
I got under the car, reached up and depressed the clip while the helper used a pair of long hose clamp pliers to grip the sensor connector.
Once I depressed the clip and told him okay, it took all of 5 seconds to come off.
I did have to take off the plastic intake manifold cover and loosen the throttle housing to get to the clip from above.
A late update.
I got the sensor off. Pretty easy once I figured it out and had a plan.
You need a helper.
I got under the car, reached up and depressed the clip while the helper used a pair of long hose clamp pliers to grip the sensor connector.
Once I depressed the clip and told him okay, it took all of 5 seconds to come off.
I did have to take off the plastic intake manifold cover and loosen the throttle housing to get to the clip from above.
#27
Driver School Candidate
Join Date: Jun 2019
Location: iowa
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
I'm going to replace the b2s1. Could you please post a picture showing where it is located? Thanks so much!
#28
It is in front of the engine, but I can't remember if it is the top or bottom one. Both are easy to get to.
The following users liked this post:
Margate330 (06-09-22)
#30
Lexus Test Driver