Question about 2005 Chevrolet Impala
2005 Impala sedan, with 65000 miles on it.. Transmission occasionaly hesitates when car is starting from a stop. It will also shift kind of hard, once in a while,when accelerating. Thanks, Ken
There are diagnostic tools that could help detect what your problem is. The Snap-On Modis, or preferably a "Tech-2" GM scanner. Any reputable transmission shop, or GM dealer should have at least one of the two. It sounds to me like it could be the transmissions "EPC" (Electronic Pressure Control solenoid) The EPC controls main line pressure, in an effort to keep shift firmness, and shift duration at one specific level. This is to compinsate for the natural wear a transmission encounters, and to keep emissions as low as possable, by keeping shift duration low. When the EPC malfunctions (and thats somthing that they like to do in the 4t65E), it typically starts to shift harder than normal. They typically throw a P1811 code. (P1811 is a "max adapt-long shift" code) And the malfunction can be intermittent. Hope this helps, and good luck.
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Posted on Jan 02, 2017
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