Tundra 2014 1794 edition

My check engine light comes on and no traction control. Dealer tells me I need to replace my transmission?? any thoughts??


PO 717. Code. Speed sensor was what came up

 

only 87,000 miles on my Tundra

 

None of us will have any idea based on the very vague and zero information you provided. A check engine light could mean thousands of different things, none of which could be related to the transmission. So without codes, and other symptoms the truck may be displaying, you probably need a transmission.

That’s like saying. My truck won’t drive straight, do I need a new battery?

 

PO 717. Speed sensor was what diagnostic eval showed on check engine light and traction off

 

If you determine the dealer was trying to screw you on an unnecessary transmission replacement, I'd name the dealer on the chance that one or more other forum members would benefit from the heads up. Rat 'em out. I sure hope a dealer wouldn't stoop to this level, but I won't be surprised either.

 

I'm not a mechanic, but a simple Google search turned up this, I'd start here:


Toyota Tundra: P0717 Meaning, Causes, & Diagnosis | Drivetrain Resource (700r4transmissionhq.com)

The good news is with P0717 there aren’t a lot of common causes, and the fix is usually pretty straightforward.

Here’s how to go about diagnosing this code in your Tundra:

The wiring harness is going to be where you would want to start looking for P0717’s causes. Check for damaged wiring, particularly where the harness plugs into the input/turbine speed sensor.
Do the pins look corrosion-free? They may need cleaning to make good contact. Use an electrical contact cleaner.

Verify that the ground is solid. If there doesn’t look to be any visible damage, you can verify the voltage with a voltmeter.

Now that you have verified that the wiring going to the input/turbine speed sensor is functioning, it’s likely that the sensor itself is malfunctioning and causing P0717 in your Tundra.

If you pull the sensor, verify that there are no metal shavings on its magnetic tip. If there are, that can be enough to disrupt the signal. You can try cleaning the shavings off and seeing if the sensor begins to function again.

Use a voltmeter to test voltage going in and out of the sensor. Otherwise, you may end up replacing a sensor that is still working fine.