P1701 Buick Reverse Engagement Error

P1702 Buick Transmission Control Module RAM

Possible causes
– Faulty Transmission Control Module (TCM)
– Transmission Control Module (TCM) harness is open or shorted
– Transmission Control Module (TCM) circuit poor electrical connection
Tech description
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1702 Buick Description

The Transmission Control Module (TCM) consists of a microcomputer and connectors for signal input and output and for power supply. The TCM controls the A/T.

Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera