Transmission

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?

Thursday, February 17th, 2011 AT 5:08 PM

5 Replies

KHLOW2008

MECHANIC
41,814 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

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

KHLOW2008

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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

WISDOM843

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4 POSTS

So I paid for no answer

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Thursday, February 17th, 2011 AT 11:11 PM

KHLOW2008

MECHANIC
41,814 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.