P0037 HO2S Bank 1 Sensor 2 Location? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Gunn · 11-09-2019, 07:55 PM

My check engine light has come on a couple of times over the last couple of weeks. Each time, I have checked the code and it is P0037 "HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2".

Can't find much info on where to find this sensor. Only thing I could find is on the V6 Camaro Bank 1 is the passenger side. But I don't know where Sensor 2 would be. I may have read that there are 3 sensors on each bank...two before the catalytic converter, and one after? But nothing definitive.

If anyone can point me to where to find this sensor, I need to check it and the wiring harness going to it for a short or other problem.

Thanks,

Tom

Gunn · 11-09-2019, 08:38 PM

Ok, I think I found it. Instead of deleting the post, I thought I'd post for others.

For the V6, the #1 cylinder is on the passenger side. That is Bank 1.

And then I found the replacement guide in my online State library Chilton manual. It says this sensor is on the "right" side. That's the passenger side.

Sensor 2 is downstream (after) the catalytic converter. The attached image is a screenshot from the Chilton manual showing the location of the harness for Sensor 2.

Now I have to see what's wrong with this sensor...

Tom

hunter1660 · 11-10-2019, 08:04 AM

If you've added an exhaust upgrade or altered the exhaust,look for wires/harness touching and or melted on exhaust. Maybe bad connection at plug. Maybe something on YouTube as to how to test sensor? Good luck

Gunn · 11-13-2019, 04:00 PM

Quote:

Originally Posted by hunter1660

If you've added an exhaust upgrade or altered the exhaust,look for wires/harness touching and or melted on exhaust. Maybe bad connection at plug. Maybe something on YouTube as to how to test sensor? Good luck

Thanks for the suggestions. The car is stock, no exhaust upgrades, etc. I followed your advice and did look at the sensor. It all looks good, the wiring goes directly away from the exhaust and sensor and is secured to the transmission on it's way up to the engine harness.

I do think there may be another issue at play here, maybe a short in my harness somewhere. This may just be the prime suspect.

I did find some Youtube videos on how to test the sensor; looks pretty straightforward, thanks!

Tom

v8 · 11-21-2019, 10:17 AM

Quote:

Originally Posted by hunter1660

If you've added an exhaust upgrade or altered the exhaust,look for wires/harness touching and or melted on exhaust. Maybe bad connection at plug. Maybe something on YouTube as to how to test sensor? Good luck

I just changed bad sensor. Looked decent on the scanner but when I bench tested it I could tell it was bad because it was intermittent. The heating element side was good, but the voltage producing side was bad.

TommyTheCat · 11-21-2019, 03:21 PM

Heater circuits go out all the time, you can check resistance on the heater circuit with a multimeter if you disconnect the sensor. The heater element is whichever 2 wires are the same color. But most likely you'll need the sensor. Bank 1 vs Bank 2 is just which side of the motor, sensor 1 is in front of the cat and sensor 2 is always afterwards

11-09-2019, 08:38 PM	#2
Gunn 2011 Camaro LT V6 Drives: 2011 Chevrolet Camaro LT (V6) Join Date: Oct 2019 Location: Maryland Posts: 42	Ok, I think I found it. Instead of deleting the post, I thought I'd post for others. For the V6, the #1 cylinder is on the passenger side. That is Bank 1. And then I found the replacement guide in my online State library Chilton manual. It says this sensor is on the "right" side. That's the passenger side. Sensor 2 is downstream (after) the catalytic converter. The attached image is a screenshot from the Chilton manual showing the location of the harness for Sensor 2. Now I have to see what's wrong with this sensor... Tom Attached Images

11-10-2019, 08:04 AM	#3
hunter1660 Drives: 2011ss/rs camaro Join Date: Sep 2011 Location: florida Posts: 1,261	If you've added an exhaust upgrade or altered the exhaust,look for wires/harness touching and or melted on exhaust. Maybe bad connection at plug. Maybe something on YouTube as to how to test sensor? Good luck __________________ . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners

11-09-2019, 07:55 PM	#1
Gunn 2011 Camaro LT V6 Drives: 2011 Chevrolet Camaro LT (V6) Join Date: Oct 2019 Location: Maryland Posts: 42	P0037 HO2S Bank 1 Sensor 2 Location? My check engine light has come on a couple of times over the last couple of weeks. Each time, I have checked the code and it is P0037 "HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 2". Can't find much info on where to find this sensor. Only thing I could find is on the V6 Camaro Bank 1 is the passenger side. But I don't know where Sensor 2 would be. I may have read that there are 3 sensors on each bank...two before the catalytic converter, and one after? But nothing definitive. If anyone can point me to where to find this sensor, I need to check it and the wiring harness going to it for a short or other problem. Thanks, Tom

11-21-2019, 03:21 PM	#6
TommyTheCat SHKE BKE Drives: 2013 Camaro Join Date: May 2014 Location: SoCal Posts: 3,105	Heater circuits go out all the time, you can check resistance on the heater circuit with a multimeter if you disconnect the sensor. The heater element is whichever 2 wires are the same color. But most likely you'll need the sensor. Bank 1 vs Bank 2 is just which side of the motor, sensor 1 is in front of the cat and sensor 2 is always afterwards