Code P0036, what is causing this code?

2008 PONTIAC GRAND PRIX
171 MILES • 5.3L • V8 • AUTOMATIC
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LAVELL11
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Need help. What else is causing this code? I changed my sensors again this time with ntk top and bottom. My wires are not damaged on both sensors they look good, and my car drive good. What else can I change to fix before emission?
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Apr 22, 2025 at 11:52 PM
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STRAILER
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We need to make sure you are changing the correct oxygen sensor. Also, you need to check the EMISSONS 1 fuse - 15 AMP in the fuse panel under the hood. Also, make sure to clear the codes once the repairs have been made.

P0036 - HO2S Heater Control Circuit (Bank 1 Sensor 2)

Here is the location of the sensor to be changed out. Check out the images (below). Please let us know what happens.
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Apr 23, 2025 at 4:08 AM
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LAVELL11
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Okay thanks, just got off work I will review what you said and check the fuse under hood.
Apr 23, 2025 at 4:45 AM
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STRAILER
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Sounds good, I hope it is just the fuse.
Apr 24, 2025 at 1:26 AM
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LAVELL11
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These are the sensors I have now brand new and yes, I changed all the fuses somewhere old but that department good, but this code still remains. Drove home just now from work it came back on p0036 nothing else and my car still perform as usual no major problems but I'm getting loss now maybe a wire I just don't know where to start checking.
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Apr 24, 2025 at 5:14 AM
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STRAILER
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Okay, then this will be a wiring issue or the PCM is bad. Here is a guide to help you check the wiring with the wiring diagrams in the images below.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Let us know what you find.
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Professional Diagram for 2CarPros Members
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Professional Diagram for 2CarPros Members
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Professional Diagram for 2CarPros Members
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Apr 25, 2025 at 2:04 AM
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LAVELL11
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Okay, thanks.
Apr 25, 2025 at 5:00 AM
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STRAILER
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np, have a good week, Let me know what happens please.
Apr 27, 2025 at 4:27 AM
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LAVELL11
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Okay, no problem.
Apr 27, 2025 at 4:29 AM
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LAVELL11
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Sorry for late hit back but found out it was burned out wiring touching down there around oil pan. It's good now.
Jun 22, 2025 at 12:51 PM
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STRAILER
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Yep, that will do it, a wiring issue or the PCM is bad were the only choices. Glad you got it fixed, thanks for letting us know and visit back anytime.
Jun 23, 2025 at 2:55 AM
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