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Codes P0715 and P1529?

Tiny
DANGELL
  • MEMBER
  • 2004 HYUNDAI SANTA FE
  • 2.7L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
I have the vehicle listed above that gives the code p 0715 and p1529. These codes indicated when I got it scanned that I needed to replace the input output speed sensor so I did replace those speed sensors and also the turbine speed sensor as well and also the wiring harness for the input speed sensor we replace that because it was a little brittle and the car speedometer now is not working it still getting the same codes and is still doing a hard jerk when you first start out and whenever we remove the input speed sensor we test the wiring that's going to the sensor coming from wherever the power source is I don't know but there is absolutely no reading on this. I was reading somewhere that it could be an oil pressure sensor. What else can we do why is there no power coming from the fuse box or wherever the power comes from exactly to the input speed sensor and we checked every fuse and none of them are blown there are two of them that are not working when you test them on the outside with a tester they don't light up anything but when you pull them they're fine and then the glove box light also went out and so did the speedometer any ideas on what I should do next I have had the shift solenoids we replace those about a year ago so I don't know if any of that could be related to maybe doing it again or something.
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Tuesday, July 30th, 2024 AT 1:15 PM

21 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
So, both green wires at the input and output sensor should have power all the time.

This guide can help you test:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

There are four fuses and two grounds that need to be checked as well which I have included in the wiring diagrams below, also if all these are okay, I would replace the TCM which feeds the speedometer.

So, these codes say

Code P0715: Input/Turbine Speed Sensor Circuit Malfunction
Code P1529: Transmission Control Module (TCM) MIL Request

I included the TCM wiring diagrams so you can see how the system works and the TCM location as well in case you need to replace it. Check out the images (below). Please let us know what happens.
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Tuesday, July 30th, 2024 AT 4:09 PM
Tiny
DANGELL
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  • 25 POSTS
So, I did everything. I replaced input output speed sensors as well as turbine and new harness and then it wouldn't shift out of first gear so then just for fun I decided I would go ahead and take off the transmission pan and replace the transmission fluid once more and clean out all of the shift solenoids and replace them all back in again and the same thing is happening except it doesn't stay in first year anymore it shifts all the way everything except for overdrive so maybe it's the TCM? Because its speedometer is still not working.
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Saturday, August 10th, 2024 AT 7:32 PM
Tiny
KEN L
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Did you clear the codes and if so are there any now? Also, did you check the fuse for power and the check TCM ground? If so, I would try swapping out the TCM, because they are low under the dash they can get wet. Also check the electrical connector for corrosion as well.
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Sunday, August 11th, 2024 AT 11:24 AM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
P 1529 p0720 and a p0715 are the codes.
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Sunday, August 11th, 2024 AT 3:59 PM
Tiny
KEN L
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So, with these codes all at the same time I would check the power source (fuse and the ground and if okay replace the TCM.

P1529 - MIL Request Signal from TCM to ECM:
P0720 - Output Speed Sensor Circuit Malfunction:
P0715 - Input/Turbine Speed Sensor Circuit Malfunction:

Let us know what you find.
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Monday, August 12th, 2024 AT 8:58 AM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
Do you have instructions how to replace TCM or diagram?
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Monday, August 12th, 2024 AT 11:46 AM
Tiny
KEN L
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Yes, in the post above I give the location of the TCM, just remove it and get another one.
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Tuesday, August 13th, 2024 AT 10:29 AM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
I ordered the TCM and it will be here on Saturday also there is I guess a hidden relay that is next to it somewhere and it was pretty fried I did bypass it just to see what was going on a little bit more and if it would help or work and no it did not change anything but I did get a new relay as well so I'm hoping come Saturday whenever I do get the new TCM everything will be okay I hope.
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Thursday, August 15th, 2024 AT 12:30 PM
Tiny
KEN L
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Me, too. Let me know I am here to help.
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Saturday, August 17th, 2024 AT 8:17 AM
Tiny
DANGELL
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I replaced TCM.
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Monday, August 26th, 2024 AT 11:01 AM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
Still not working. Speedometer not working. Still not shifting any better.
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Monday, August 26th, 2024 AT 11:05 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Do you have the same codes?
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Tuesday, August 27th, 2024 AT 9:06 AM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
Yes, it's the same codes p0715 and 1529.
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Friday, August 30th, 2024 AT 7:24 PM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
How do I send a picture to you of what it said? I was actually wrong on the codes for some reason I thought I grabbed a different kind of paper but it says the brake sensor ABS is what it says and it's a p1529 is all that shows up it says replace wheel speed sensor which I've done already I mean I can only find one wheel speed sensor on this car. It doesn't matter where I look I've looked so many different places but there's one on the rear only on the driver side and then there's one on the passenger side up front but I was watching all these different videos however and it kept showing two of them on the front which for the life of me and my friend cannot even remotely find where they're talking about that the front left one is but I've replaced the one on the right front.
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Friday, August 30th, 2024 AT 8:48 PM
Tiny
KEN L
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You can upload the images in your response. Also, the pulse generator A and B that control the speedometer and input shaft readings.
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Saturday, August 31st, 2024 AT 3:44 PM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
Any other suggestions? It doesn't want to shift out of first gear but when I do put it and do it in manual mode it seems to shift a little bit at least and I can drive it a little bit but not very fast no more than like 40 miles an hour.
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Sunday, September 15th, 2024 AT 6:02 AM
Tiny
KEN L
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If the speedometer is not working, then the transmission will not shift automatically. Can we check the fuse #14 and #25 in the fuse panel inside the car, these control the TCM. Here is a guide and the fuse locations:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here are the fuse locations. Test with the key on. if they are okay, I would test the wiring between the output shaft sensor and the TCM.

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

Check out the images (below). Please let us know what happens.
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Sunday, September 15th, 2024 AT 9:44 AM
Tiny
DANGELL
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These are the fuses that are not lighting up but look good when I pull them.
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Monday, September 23rd, 2024 AT 7:48 PM
Tiny
KEN L
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The fuses looks good, it can be normal for the fuses to not light up, was the key on while testing? It does not look like those fuses have anything to do with the system in question, can you confirm by giving me the fuse numbers? Did you check the power and ground to the TCM?
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Tuesday, September 24th, 2024 AT 2:00 PM
Tiny
DANGELL
  • MEMBER
  • 25 POSTS
Here's what codes are. When I test the wires what exactly am I looking for just the continuity or power whatever or what exactly do I need to be looking for whenever we test the wires and you're talking about the wires coming from the TCM to the output sensor right.
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Friday, September 27th, 2024 AT 2:28 PM

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