Hey folks. I have a 2007 LS460 and have been trying to figure out an issue with multiple lights: CEL, traction control, check VSC... I initially though the problem may be my older battery (2020) only showing around 11 volts so I bought a new one and now showing over 13.6v so this shouldn't be giving me issues. I cleared the codes and it is still pulling P0037. I went ahead and replaced the B1S2 02 sensor since it only took about 20 minutes, cleared codes and it is yet again pulling P0037.

Here are some of the current values after letting it come up to temperature:
Oxygen Sensor Current B1S1 0mA
Oxygen Sensor Voltage B1S1 3.330v
Oxygen Sensor Voltage B1S2 responsive between 0.565 and 0.605v

What else can I be missing? Thank you for any help and guidance here.

 

From what I know P0037 is the sensor heating circuit issue. So if you not seeing 12V on the heater wires (is that oxygen sensor current B1S1 0mA indicating no power to the heater?) then you have some wiring issue. Maybe corroded pin in one of the connectors, or just broken wire. Need to find in the schematic which wire is the power for the sensor heater and just check it out.

 

Thought it does sound like a wiring issue....try Cataclean 1st. Sometimes we get so technical about issues & overlook the obvious things.

 

The code P0037 has to do with B1S2 O2 sensor so I'm not sure about the 0v showing for the upstream Oxygen Sensor Current however they do show 3.300v for Oxygen Sensor Voltage for both B1S1 & B2S1. I also just ordered 2 bottles the Cataclean so we'll see if that helps over the next week or so. I'll continue to research on here and see what else I can find. Keep the ideas coming. Thanks all!

 

3.3V that you talking about is the sensor (the actual sensor that measures O2 content) voltage and it is normal. P0037 is the code for the failed heating element that supposed to warm that sensor up to the normal operating temperature. If you replaced that sensor and the code still active, you probably have some wiring issue.

 

Anything that you pour in the fuel tank will be very diluted and have no effect on the cats, save the money and return it if you can.

 

@ gerf
I totally disagree
I had error codes on 3 of the 4 02 sensors. Once the reality of what it takes to replace the downstream sensors hit, i started looking for alternatives. CataClean is used with only a quarter tank of gas. 1 treatment, then a fill up, the codes where gone. I added the 2nd bottle when i filled up. I didn't even have to clear the codes. It's gonna clean the 02 sensors & cat. I follow up with 1 treatment every 6 mo.
it's been 18 mo since I started this. Haven't had a code since then. It can't hurt. Anybody with 02 codes should at least try it 1st. I'm not trying to claim that it's some kind of miracle in a bottle & it'll solve all your problems, but it did work for me.

 

That's ok, the question was about code P0037 the heater circuit on the o2 sensor and adding anything to the fuel isn't going to fix that. The fact that you feel it worked on your 3 o2 sensors for whatever code you had if you recorded them doesn't mean it's going to help the other guys problem. You could've just got some bad gas.

 

I agree with you, but the P0037can be thrown from a dirty or overheating sensor. My suggestion was simply to try clean it 1st. That can be done without the hassle of removing it & the cost is minimal. Just like any wound or even a battery (leads). You clean it 1st then assess the damage. Fortunately for me, that's all it took.