Transmission

Tiny
WISDOM843
  • MEMBER
  • 2005 CHEVROLET MONTE CARLO
  • 6 CYL
  • AUTOMATIC
  • 106,000 MILES
05 monte carlo LS- hard shifting, took to transmission shop and they gave me code p1811. Also my speedometer doesnt function properly, could the pcm send bad messages to transmission? Also I got code p0128 thermostat. Any ideas?
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Thursday, February 17th, 2011 AT 5:08 PM

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Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
P0128 and P0218 are two different codes, one is for the coolant temperature whle the other is for the transmission fluid temperature. P0128 should not be related to P1811 but P0218 can trigger P1811.

Kindly reconfirm the codes.
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Thursday, February 17th, 2011 AT 6:11 PM
Tiny
WISDOM843
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My main question was about 05 monte carlo LS- hard shifting, took to transmission shop and they gave me code p1811. Also my speedometer doesnt function properly, and I have a hard time taking my key out the ignition every now and than, any ideas?
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Thursday, February 17th, 2011 AT 6:40 PM
Tiny
KHLOW2008
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  • 41,815 POSTS
The codes would tell you what is wrong and if information are not sufficient, we would not be able to provide any suggestions.
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Thursday, February 17th, 2011 AT 6:47 PM
Tiny
WISDOM843
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So I paid for no answer
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Thursday, February 17th, 2011 AT 11:11 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
I am asking for more information but you are not gpoing to provide them so how would you expect us to help?

P1811 is a transmission trouble code and I need to confirm if it is the transmission fluid temperature that is causing the problem. Speedometer noty functioning can be due to the transmission or vehicle speed sensor problem and it can cause harsh shifting as well.
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Friday, February 18th, 2011 AT 1:01 PM

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