Code P0717 Input speed sensor, difficulty starting and transmission hangs in second or third gear

MENDTE

MEMBER
2007 HYUNDAI SANTA FE
2.7L
V6
4WD
AUTOMATIC
150,000 MILES

Recently bought the vehicle listed above gasoline and it had a slight engine failure. It takes time to turn on and the transmission locks up after rolling in third gear. I used the blue driver and the fault codes are as follows:

Confirmed codes

P0717 Input speed sensor.
replace the sensor and the problem remains. I have doubts about the cables of the pins, in a diagram I saw that pin 1 is ground, pin2 is 5v signal and pin 3 is 12v power. This is the same as the output sensor. In a diagram shared by Mr. Ken in an old post, administrator of this site, it appears that the input sensor, pin 1 is ground, pin 2 is 12v power and pin 3 is 5v signal. In my truck it seems that in both sensors the 5v signal was pin 2 as measured. I'm a bit confused here.

P0340 Camshaft position sensor bank 1
i replace the sensor and still the active code. I measured and I have present the 12v signal and ground in the connector

Pending codes:

P0462 fuel level sensor circuit low
p2067 fuel level sensor b circuit low
p2065 fuel level sensor b circuit
p0452 evap. Emission ctrl. System- pressure sensor low input.

When I bought the truck, it did not show the fuel level. Then I changed the complete assembly of the fuel pump, I checked the resistance of the sensor b and it was fine. Now it correctly marks the fuel level in the cluster, but it keeps showing me these codes.
My fuel pump model does not have the pressure sensor on the top, so I'm confused about the p0452 code.

P0501 Vehicle speed sensor range performance.
I changed the pinion gear on the speed sensor because it had a broken tooth. It continues the same code and does show the speed in the cluster.

P0447 Evap emission ctrl system vent circuit open (SOV)
Have not checked yet

p0057 O2 sensor bank 1 sensor 2
p0037 O2 sensor bank 2 sensor 2
Have not checked yet, but I consider less relevant codes.

please help me.
thanks in advance.

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi,

You have a lot going on here. Let's focus on the input speed sensor first. As far as the pins in the connector, they are as follow:

Pin 1 - Ground

Pin 2 - 5v reference

pin 3 - battery voltage

See pics below.

Are these the signals you are getting at the sensor?

Let me know.

Joe

Images (Click to make bigger)

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Friday, November 19th, 2021 AT 10:56 PM

MENDTE

MEMBER
2 POSTS

Hi, first of all thanks for the fast response. I rechecked the terminals and I found no ground on pin 1 of the input sensor. Then I checked the output sensor ground and is present but weak.
Now it's clear to me, I have a ground problem and I want to check first the ground connection with chassis for this specific circuit before teardown the harness.
Do you know where I can find this?
I appreciate your help.

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Saturday, November 20th, 2021 AT 7:48 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi,

Yes, it is on the left rear of the engine (driver's side). I attached the schematic for the transmission below. I had to cut it in half to make it readable. I did overlap them so you can follow from one to the next.

In pic 2, I highlighted and circled the components and ground.

I hope this helps. Also, I have to keep these threads specific to one topic. Copy and paste some of your other questions to a new thread and that way we can get started on them at the same time.

Here is the link to start a new one:

https://www.2carpros.com/questions/new

We do this so it is more helpful to others. I hope you understand.

Take care,

Joe

See pics below.

Images (Click to make bigger)