trouble code help

bigpoppa06 · #1 (**permalink**) 05-06-07, 06:17 PM

hey guys i have a 95 eldorado etc my dic showed up troube code p056 current transmission input speed sensor whats does this sensor acually do and can i still drive the car ok and second t073 traction disabled could it be traction control module could u guys give me a little input thanks

**Ranger** · #2 (**permalink**) 05-06-07, 09:54 PM

The input speed sensor monitors the input shaft speed. The PCM uses its information to monitor shift timing, TCC slip speed and gear ratio. It is a $20 part $2000 deep in the trans. I would suspect it will not shift properly if it is inop.

Not sure if that would set the T073 and disable the T/C or not. That may or may not be a separate issue.

basmster · #3 (**permalink**) 05-07-07, 01:24 PM

I had the same code in my Seville. It came up as a low speed sensor. I never felt any difference so I ignored it for 40k miles. Then the trans exploded at 100k miles. I should have not ignored it..... I dont know what the sensor does, but the dealer told me that it was probably not shifting properly and slipping which I didnt feel and triggered the sensor. All I know is that it cast me a $3k GM rebuilt unit..