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I jut got a p0727 and a p0726 codes on my 03 silverado

duramax after ive already put...
I jut got a p0727 and a p0726 codes on my 03 silverado duramax after ive already put in a new cranckshaft position sensor what else could it be?
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Answered in 2 minutes by:
1/17/2018
Ron
Ron, ASE Certified Technician
Category: Chevy
Satisfied Customers: 38,839
Experience: 35 years experience with ASE Certs
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Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

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The common cause of these two codes to set are not caused by a failing crankshaft position sensor but instead, these usually set due to a failing Input Speed Sensor and or the connection to it. I would start with checking the connector to be sure its clean and tight and if so replace the sensor and clear the codes and see if they reset. See the location and install steps in the link below.

https://www.dropbox.com/s/0b496twfg8p9tru/Input%20Jan%2017.pdf?dl=0

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Customer reply replied 7 months ago
Really? I was told the cranckshaft positon sensor was the input speed sensor?

No its not, the crankshaft sensor mounts up front of the engine is the engine front cover. The codes P0727 and P0726 are input sensor codes .

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Customer reply replied 7 months ago
Ok so wheres the input speed sensor located?

I sent you a link to its location on the transmission bell housing in the link above. If you're not seeing it then see it again in the link below.

https://www.dropbox.com/s/0b496twfg8p9tru/Input%20Jan%2017.pdf?dl=0

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Customer reply replied 7 months ago
Ok thank you very much!!!and like i said before another mechanic told me the crankshaft position was the same as the speed sensor smh! But thankyou!

Your very welcome and thank you as well. Please take a moment to rate my service at the top right hand side of the page so I can get credit for my time, the question remains open for follow up even after doing so, all you need to do is return to this question if need be.

Thank you again.

Ron
Ron, ASE Certified Technician
Category: Chevy
Satisfied Customers: 38,839
Experience: 35 years experience with ASE Certs
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