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When vehicle switches from 3rd to 4th it starts jerking
Vehicle: 2008 Buick Enclave 3.6L
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1 Answer

Hi there

This code points to an issue with the transmission mode switch. Here is some info on the code.

P071D - Transmission Mode Switch 'B' Circuit

Read more: https://www.autocodes.com/p071d.html

answered by (8.9k points)

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