P0612 Buick Fuel Injector Control Module Relay Control

P0613 Buick Transaxle Control Module System Fault

Possible causes
– Faulty Transmission Control Module (TCM)
– Transmission Control Module harness is open or shorted
– Transmission Control Module circuit ppor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0613 Buick Description

The Engine Control Module (ECM) has detected an internal failure in the Transmission Control Module (TCM).

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