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Input speed sensor location not vss

Tiny
BILLHVAC
  • MEMBER
  • 2003 BUICK CENTURY
  • 3.1L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
I have no speedometer. Will not shift out of first gear. I have replaced VSS and PCM. Still no change. I need to know where transmission input speed sensor location to install new one. Please help.
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Sunday, June 25th, 2017 AT 5:29 AM

17 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
It is number 440 in this picture but that sensor will have no effect on the speedometer.

https://www.2carpros.com/images/external/105997639.gif
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Sunday, June 25th, 2017 AT 8:59 AM
Tiny
BILLHVAC
  • MEMBER
  • 8 POSTS
I have checked fuses. It was shifting a little high periodically. Do you. Have any advice. I am inching it to transmission. Shop tomorrow. Thanks
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Sunday, June 25th, 2017 AT 9:22 AM
Tiny
BILLHVAC
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No DTC codes.
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Sunday, June 25th, 2017 AT 9:24 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
That input sensor could effect your shifting problem but it has no effect on speed readings. If you are still having speedometer issues, you could have wiring problems or a defective output sensor. You really need a lab scope to test the signal coming out of the VSS sensor.
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Sunday, June 25th, 2017 AT 9:25 AM
Tiny
BILLHVAC
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  • 8 POSTS
Thanks.
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Sunday, June 25th, 2017 AT 9:29 AM
Tiny
BILLHVAC
  • MEMBER
  • 8 POSTS
I have replaced VSS. No change.
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Sunday, June 25th, 2017 AT 10:21 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Hello,

There is a fuse 10 amp hot when cranked over that sounds like it might be blown. Here is a wiring diagram for the cluster (below) so you can do some testing.

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

Please run this test and get back to us so we can continue helping you.

Cheers, Ken
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Tuesday, June 27th, 2017 AT 1:56 PM
Tiny
BILLHVAC
  • MEMBER
  • 8 POSTS
I feel a little stupid and relieved. It was a broken wire to vss
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Tuesday, June 27th, 2017 AT 7:51 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,960 POSTS
Good to hear, please use 2CarPros anytime we are here to help.

Cheers, Ken
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Wednesday, June 28th, 2017 AT 11:15 AM
Tiny
JUSTIN WEEKS
  • MEMBER
  • 1 POST
Need help finding input speed sensor on 99 buick century 3.1 v6, I repllaced output sensor but need to replace input having shifting issues plz help. Code pulled p0502
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Wednesday, January 16th, 2019 AT 6:57 PM
Tiny
KEN L
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This car does not have a input shaft speed sensor here are the transmission wiring diagrams to confirm the issue so you can see how it works. P0502 is for the VSS I would use this guide and the wiring diagrams to confirm the connection between the sensor and the PCM

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

Check out the diagrams (Below). Please let us know what you find.
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Thursday, January 17th, 2019 AT 10:51 AM
Tiny
JAZZMINM21
  • MEMBER
  • 1 POST
I need to find the input speed sensor on a 2001 Buick Century
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Saturday, August 17th, 2019 AT 11:49 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,960 POSTS
It looks like it is in the same please as newer models check the diagrams above and below. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Sunday, August 18th, 2019 AT 12:01 PM
Tiny
ERICBOSTWICK
  • MEMBER
  • 1 POST
  • 2002 BUICK CENTURY
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Cannot find location of the input sensor.
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Tuesday, November 26th, 2019 AT 7:59 PM (Merged)
Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
The vehicle speed sensor (VSS) is located on transaxle right axle case extension.
If you are wanting to replace it, it is probably best to remove the right front wheel to gain access.
Then simply unplug the harness connector, then unbolt the sensor and do not forget it has an o-ring. To install, reverse order. Tighten the bolt to 8 ft lbs.
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Tuesday, November 26th, 2019 AT 7:59 PM (Merged)
Tiny
ERICBOSTWICK
  • MEMBER
  • 1 POST
I am looking for the input speed sensor not the output.
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Tuesday, November 26th, 2019 AT 7:59 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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It inside the transmission pan near the valve body. This guide will help you see what you are in for when dropping the pan so you can change the sensor out with diagrams below on how to do the job and the sensor location.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Tuesday, November 26th, 2019 AT 7:59 PM (Merged)

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