Codes P0036, P0138, P0141, P0523 and P0700, Transmission issues?

Tiny
LEYNA
  • MEMBER
  • 2016 CHEVROLET SILVERADO
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
I've been having issues with transmission, but my question is what would be the reason that when I have extra weight in back of bed of truck, I seem not to have no trouble with transmission. Example: when I was out filling deer feeders I noticed once there's less weight in back is when I have issues with gears not engaging in drive had to drive in reverse back home. I'm getting codes p0036, p0138, p0141, p0523 and p0700.
Monday, February 3rd, 2025 AT 9:23 AM

8 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
So it looks like you have three problems with the truck. Please start new threads for the 02 sensor and the oil pressure issue. We will work on the P0700 code on this thread.

P0036 - HO2S Heater Control Circuit (Bank 1, Sensor 2)
P0138 - O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)
P0141 - O2 Sensor Heater Circuit (Bank 1, Sensor 2)

P0523 - Engine Oil Pressure Sensor Circuit High Voltage

P0700 - Transmission Control System Malfunction

I would start by checking the transmission fluid level and condition and if you have not serviced the transmission, I would give that a try first and then clear the codes.
Check out the images (below). Please let us know what happens.
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Tuesday, February 4th, 2025 AT 10:30 AM
Tiny
LEYNA
  • MEMBER
  • 17 POSTS
Already did a transmission flush and installed new filter but still no luck I've noticed it'll go into gears fine but once you put in drive it sounds like it goes into limp mode it just doesn't sound the same and I'm noticing the transmission temp jumps for about 127 to 154 not sure if that's bad but every now and then the d gear on dash will start blinking.
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Friday, February 7th, 2025 AT 12:30 PM
Tiny
LEYNA
  • MEMBER
  • 17 POSTS
Now one other things is ok so while back give or take about 3 months ago we live on a ranch and we were out putting feed for deer and we'll we ended up stuck in sand and it sank of course and when they were trying to get out the muffler got hot and we'll the little bit of grass that was under caught fire and we tried putting it out no luck all in all truck never exploded like I thought it was assuming the sand turned it off thankfully but now after that we did have trouble noticing it was kind of hard to get into gear got that taken care of but now having these issues.
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Friday, February 7th, 2025 AT 12:35 PM
Tiny
LEYNA
  • MEMBER
  • 17 POSTS
Sorry another thing is theirs is a lot of mud built up underneath the truck. Could that be a possible culprit of my issues with transmission maybe. I'll get pictures or video to show how it looks underneath and what solenoids or sensors and fuses should I be checking to see if any are faulty or how to check wiring to see if issues with that but not sure exactly where all sensors are located on truck.
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Friday, February 7th, 2025 AT 12:38 PM
Tiny
KEN L
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  • 54,137 POSTS
So the truck was on fire?
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Saturday, February 8th, 2025 AT 9:57 AM
Tiny
LEYNA
  • MEMBER
  • 17 POSTS
At bottom yes for a bit turned off when we brought it back home it drove back fine only thing noticed was that was a little hard to engage in gears but had someone come look at it only thing he found was that the a linkage was off but now this problem is not all the time it happens every now and then but also what would be the reason when there is weight in back of bed no issues at all but once weight is reduced in back when issues seem to arise.
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Sunday, February 9th, 2025 AT 12:13 PM
Tiny
LEYNA
  • MEMBER
  • 17 POSTS
I'll try to get picture of under truck.
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Sunday, February 9th, 2025 AT 12:14 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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I am wondering if the shifter cable melted which sounds like what happened.
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Monday, February 10th, 2025 AT 9:42 AM

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