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Re: Chevy Impala p1811
Posted to Transmission Forum on 3/25/2007

Jonathan,

Run the EPC versus line pressure test, line pressure MUST change 10 to 15 pounds for EACH .1 amp change in EPC current, if it does not the EPC is bad.

This code can set because of a faulty EPC, that said if the EPC checks good then likely the pro... Login to read more.