Turbine speed sensor problem

[visciglia]

Please any suggestions with the issue I'm having . Wrench light comes on and vehicle loses power

On acceleration . I shut if off and turn it back on and it runs like nothing happened. Right now is has

75000 miles . Took it to the dealer diagnostic was turbine speed sensor . Sensor was replaced and it

Still doing the same thing . Went back to the dealer and they replaced a wire harness from the transmission

It helped a little bit it doesn't do it as often but I'm still having the problem .

Please help any suggestions what might be going on . I would appreciate

And feedback to see I can get this fixed . Thanks to all

[akirby]

Probably the throttle body. Find a mechanic that does actual diagnostics and doesn't just guess and replace random parts.

 

BTW - your Edge does not have a Turbine.

Edited July 11, 2014 by akirby

[Waldo]

Probably the throttle body. Find a mechanic that does actual diagnostics and doesn't just guess and replace random parts.

 

BTW - your Edge does not have a Turbine.

 

Sure it does, just like every conventional automatic transmission, the turbine is part of the torque converter.

 

From the shop manual:

 

Turbine Shaft Speed (TSS) Sensor

This Turbine Shaft Speed (TSS) sensor is a Hall-effect pickup that sends a signal to the PCM that indicates transaxle turbine shaft input speed. The TSS sensor provides converter turbine speed information for TCC strategy. Also used in determining static LPC pressure settings.

 

 

When the TSS fails, the transmission defaults to staying in 5th gear, so you would certainly notice a loss of performance under acceleration. If the code being shown is for the TSS, then there is no further diagnostics needed, you just need to figure out where the fault is. If replacing the wiring harness had an effect on the problem but didn't eliminate it, then it likely means that the fault is somewhere in the connections at one end of that harness.

Edited July 11, 2014 by Waldo

[akirby]

Well you learn something new every day. If the code pointed to the TSS then it sounds like they were doing the right troubleshooting.

 

But it sure sounded like the throttle body issue.......

[autom8r]

visciglia:

 

I would drive it over to an autozone and have them scan your PCM. If the CEL is on, then the PCM has stored some [or many] DTCs. Some of these codes will pile up on each other. The idea is to eliminate the easier DTC codes first before fixing the more expensive ones. Replacing the TSS is more expensive than replacing the wiring harness that serves the transmission. If a scan and other DTCs pointed to other problems in the transmission, they should've replaced with the harness first before the TSS.

 

Personally, I like to know what I'm up against before I go to a dealer. A small investment in an OBD reader can save you alot of time and headache. They're generally inexpensive, easy to use, and will work on anyone's car regardless of make [one of the smarter things the government has done for the taxpayer] so long as it uses a computer to control the engine .

 

Just my 2 cents, I'm a skeptic that way.

 

Good luck

[WWWPerfA_ZN0W]

Probably should replace the TSS and OSS in pairs, to avoid the dreaded ODO Error that crops up later on in the service life.

 

Any trouble with shifting or does it feel like there is a misfire? Wheel speed sensors are also known to go bad from time to time.

 

And BTW, try cleaning the MAF sensor with MAF cleaner to see if that makes any difference. It can cause symptoms like a slipping gear or hesitation or power loss etc.